![]() |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
![]()
http://www.pitt.edu/~jdnorton/papers/companion.doc
John Norton: "These efforts were long misled by an exaggeration of the importance of one experiment, the Michelson-Morley experiment, even though Einstein later had trouble recalling if he even knew of the experiment prior to his 1905 paper. This one experiment, in isolation, has little force. Its null result happened to be fully compatible with Newton's own emission theory of light. Located in the context of late 19th century electrodynamics when ether-based, wave theories of light predominated, however, it presented a serious problem that exercised the greatest theoretician of the day." http://philsci-archive.pitt.edu/1743/2/Norton.pdf John Norton: "In addition to his work as editor of the Einstein papers in finding source material, Stachel assembled the many small clues that reveal Einstein's serious consideration of an emission theory of light; and he gave us the crucial insight that Einstein regarded the Michelson-Morley experiment as evidence for the principle of relativity, whereas later writers almost universally use it as support for the light postulate of special relativity. Even today, this point needs emphasis. The Michelson-Morley experiment is fully compatible with an emission theory of light that CONTRADICTS THE LIGHT POSTULATE." http://www.amazon.com/Relativity-Its.../dp/0486406768 "Relativity and Its Roots" By Banesh Hoffmann "Moreover, if light consists of particles, as Einstein had suggested in his paper submitted just thirteen weeks before this one, the second principle seems absurd: A stone thrown from a speeding train can do far more damage than one thrown from a train at rest; the speed of the particle is not independent of the motion of the object emitting it. And if we take light to consist of particles and assume that these particles obey Newton's laws, they will conform to Newtonian relativity and thus automatically account for the null result of the Michelson-Morley experiment without recourse to contracting lengths, local time, or Lorentz transformations. Yet, as we have seen, Einstein resisted the temptation to account for the null result in terms of particles of light and simple, familiar Newtonian ideas, and introduced as his second postulate something that was more or less obvious when thought of in terms of waves in an ether." http://www.amazon.com/Relativity-Its.../dp/0486406768 Banesh Hoffmann: "In an accelerated sky laboratory, and therefore also in the corresponding earth laboratory, the frequence of arrival of light pulses is lower than the ticking rate of the upper clocks EVEN THOUGH ALL THE CLOCKS GO AT THE SAME RATE. (...) As a result the experimenter at the ceiling of the sky laboratory will see with his own eyes that the floor clock is going at a slower rate than the ceiling clock - EVEN THOUGH, AS I HAVE STRESSED, BOTH ARE GOING AT THE SAME RATE. (...) THE GRAVITATIONAL RED SHIFT DOES NOT ARISE FROM CHANGES IN THE INTRINSIC RATES OF CLOCKS. It arises from WHAT BEFALLS LIGHT SIGNALS AS THEY TRAVERSE SPACE AND TIME IN THE PRESENCE OF GRAVITATION." James H. Smith "Introduction à la relativité" EDISCIENCE 1969 pp. 39-41: "Si la lumière était un flot de particules mécaniques obéissant aux lois de la mécanique, il n'y aurait aucune difficulté à comprendre les résultats de l'expérience de Michelson-Morley.... Supposons, par exemple, qu'une fusée se déplace avec une vitesse (1/2)c par rapport à un observateur et qu'un rayon de lumière parte de son nez. Si la vitesse de la lumière signifiait vitesse des "particules" de la lumière par rapport à leur source, alors ces "particules" de lumière se déplaceraient à la vitesse c/2+c=(3/2)c par rapport à l'observateur. Mais ce comportement ne ressemble pas du tout à celui d'une onde, car les ondes se propagent à une certaine vitesse par rapport au milieu dans lequel elles se développent et non pas à une certaine vitesse par rapport à leur source..... Il nous faut insister sur le fait suivant: QUAND EINSTEIN PROPOSA QUE LA VITESSE DE LA LUMIÈRE SOIT INDÉPENDANTE DE CELLE DE LA SOURCE, IL N'EN EXISTAIT AUCUNE PREUVE EXPÉRIMENTALE." http://www.perimeterinstitute.ca/ind...ecture_id=3576 John Stachel: "Einstein discussed the other side of the particle-field dualism - get rid of fields and just have particles." EINSTEIN'S 1954 CONFESSION: "I consider it entirely possible that physics cannot be based upon the field concept, that is on continuous structures. Then nothing will remain of my whole castle in the air, including the theory of gravitation, but also nothing of the rest of contemporary physics." John Stachel's comment: "If I go down, everything goes down, ha ha, hm, ha ha ha." http://www.nature.com/nature/journal...l/433218a.html John Barrow: "EINSTEIN RESTORED FAITH IN THE UNINTELLIGIBILITY OF SCIENCE. Everyone knew that Einstein had done something important in 1905 (and again in 1915) but almost nobody could tell you exactly what it was. When Einstein was interviewed for a Dutch newspaper in 1921, he attributed his mass appeal to the mystery of his work for the ordinary person: "Does it make a silly impression on me, here and yonder, about my theories of which they cannot understand a word? I think it is funny and also interesting to observe. I am sure that it is the mystery of non-understanding that appeals to themit impresses them, it has the colour and the appeal of the mysterious." Relativity was a fashionable notion. It promised to sweep away old absolutist notions and refurbish science with modern ideas. In art and literature too, revolutionary changes were doing away with old conventions and standards. ALL THINGS WERE BEING MADE NEW. EINSTEIN'S RELATIVITY SUITED THE MOOD. Nobody got very excited about Einstein's brownian motion or his photoelectric effect but RELATIVITY PROMISED TO TURN THE WORLD INSIDE OUT." http://io9.com/5607692/are-physicist...up-dark-energy Dave Goldberg, Associate Professor of Physics at Drexel University: "The idea of dark energy is so ridiculous that almost every question is based on trying to make it go away. And believe me, I share your concerns. I don't want to believe in dark energy, but I have no choice. (...) Basically, if you want to get rid of dark energy, you have to get rid of relativity." http://www.nytimes.com/2010/01/26/science/26essay.html "The worrying continued. Lawrence Krauss, a cosmologist from Arizona State, said that most theories were wrong. "We get the notions they are right because we keep talking about them," he said. Not only are most theories wrong, he said, but most data are also wrong..." http://www.smithsonianmag.com/scienc.../87150187.html "Dark Energy: The Biggest Mystery in the Universe (...) "We have a complete inventory of the universe," Sean Carroll, a California Institute of Technology cosmologist, has said, "and it makes no sense." http://www.autodidactproject.org/oth...deology_2.html Ideology of/in Contemporary Physics, Jean-Marc Lévy-Leblond "In this way, major advances in modern physics, especially in relativity and quantum mechanics, have paradoxically fed an intensely irrational current. One knows the popular expression for scepticism and unconcern: 'everything is relative . . . as Einstein said' (and this is not so harmless as one would believe). At a seemingly more elaborate level, the mad attempts of Bergson to criticise and reinstate the theory of relativity within his own philosophy, even if they took place fifty years ago, still give evidence of a serious crisis in the relations between science and philosophy. (...) As far as the theories of relativity or quantum physics are concerned, the last fifty years have hardly witnessed any major evolution in their mode of presentation. Most handbooks are surprisingly similar, repeating indefinitely the same schemes of inner organisation. As a general rule, a historical or rather chronological introduction - of dubious accuracy - is followed by some philosophical reflections in which traditional dogmas are enunciated under a much more schematic and poorer form than that of their creators. Having fulfilled this first task, the author then approaches the 'strictly scientific' content of the book. It consists, in general, of purely theoretical, exaggeratedly formalistic accounts, from which references to real experiments steadily vanish. Not a single impression is left of the real procedures of scientific activity, of the dialectic between theory and practice, heuristic models and formalism, axioms and history. Modern physics appears as a collection of mathematical formulae, whose only justification is that 'they work'. Moreover, the 'examples' used to 'concretise' the knowledge are often totally unreal, and actually have the effect of making it even more abstract. Such is the case when the explanation of special relativity is based on the consideration of the entirely fictitious spatial and temporal behaviour of clocks and trains (today sometimes one speaks of rockets . . . it sounds better . . . but it is as stupid!). This kind of science fiction (which is not even funny) is the more dangerous as erases the existence of a large experimental practice, where the theory of relativity is embodied in the study of high-energy particles, involving hundreds of scientific workers, thousands of tons of steel and millions of dollars. (...) This teaching situation, even if it appears unhealthy and harmful with regard to the simple aims of training and teaching (transmission of knowledge), is however in perfect ideological harmony with the general context of modern physics. A closed arduous, forbidding education, which stresses technical manipulation more than conceptual understanding, in which neither past difficulties nor future problems in the search for knowledge appear, perfectly fulfils two essential roles: to promote hierarchisation and the 'elite' spirit on behalf of a science shown as being intrinsically difficult, to be within the reach of only a few privileged individuals; and to impose a purely operational technical concept of knowledge, far from a true conceptual understanding, which would necessarily be critical and thus would reveal the limits of this knowledge. This is why discussions about educational problems take on the form of ideological struggle. It is also why, because of the essentially political nature of the resistance to change in this field, no reformist illusions should be entertained as to the possibility of any major successes, as long as such a struggle only relies on the internal critique of scientific workers and teachers, remaining within the framework of an unchanged technical and social division of labour. (...) The very availability of an essay as this reflects the existence of a deep ideological crisis in the scientific milieu. This crisis is particularly obvious in the field of physics. It is expressed, on the one hand, by a lack of motivation on the part of many young research workers, and, on the other hand, by the efforts of readjustment and self-justification on the part of the establishment. It is characterised by a serious loss of credibility in traditional values, which before had made it possible for research workers to create acceptable self-images. (...) Average scientists do not even control the meaning of their own work. Very often, they are obscure labourers in theoretical computation or experimentation; they only have a very narrow perspective of the global process to which their work is related. Confined to a limited subject, in a specialised field, their competence is extremely restricted. It is only necessary to listen to the complaints of the previous generations' scientists on the disappearance of 'general culture' in science. In fact, the case of physics is eloquent on the subject. One can say that, until the beginning of this century, the knowledge of an average physicist had progressed in a cumulative way, including progressively the whole of previous discovery. The training of physicists demanded an almost universal knowledge in the various spheres of physics. The arrival of 'modern' physics has brought about not only the parcelling of fields of knowledge, but also the abandonment of whole areas. I have already said that important sections of nineteenthcentury physics are today excluded from the scientific knowledge of many physicists. Therefore the fields of competence are not only getting narrower, but some of them are practically vanishing altogether. If physicists no longer know about physics, a fortiori they know nothing about science! The idea of a 'scientific culture', of a 'scientific method', of a 'scientific spirit', which were common to all scientists and used to give them a large capacity for the rational understanding of all reality, have turned into huge practical jokes. True, some scientists have access to a global vision of their field or even of the social organisation of science and social ties, but that tends to depend solely on the position of power they occupy. The others, massively, are dispossessed of all mastery over their activity. They have no control, no understanding of its direction." http://www.i-sem.net/press/jmll_isem_palermo.pdf Jean-Marc Lévy-Leblond: "La science souffre d'une forte perte de crédit, au sens propre comme au sens figuré : son soutien politique et économique, comme sa réputation intellectuelle et culturelle connaissent une crise grave. (...) Mais le plus grave peut-être dans la déculturation de la science se situe à l'extérieur de la recherche scientifique, à l'interface entre le milieu scientifique proprement dit et la société au sens large." http://www.archipope.net/article-12278372-6.html "Nous nous trouvons dans une période de mutation extrêmement profonde. Nous sommes en effet à la fin de la science telle que l'Occident l'a connue », tel est constat actuel que dresse Jean-Marc Lévy-Leblond, physicien théoricien, épistémologue et directeur des collections scientifiques des Editions du Seuil." http://archives.lesechos.fr/archives...077-80-ECH.htm "Physicien au CEA, professeur et auteur, Etienne Klein s'inquiète des relations de plus en plus conflictuelles entre la science et la société. (...) « Je me demande si nous aurons encore des physiciens dans trente ou quarante ans », remarque ce touche-à-tout aux multiples centres d'intérêt : la constitution de la matière, le temps, les relations entre science et philosophie. (...) Etienne Klein n'est pas optimiste. Selon lui, il se pourrait bien que l'idée de progrès soit tout bonnement « en train de mourir sous nos yeux »." Pentcho Valev |
#2
|
|||
|
|||
![]()
A new iconoclast has just emerged in Einsteiniana:
http://www.newstatesman.com/ideas/20...terview-theory "String theorist Brian Greene has grown from maths prodigy to physics iconoclast. Now he hopes to prove a grand theory of everything. (...) Asked to name his scientific hero, he picks Albert Einstein, along with Edward Witten, a Princeton physicist. At the start of the 20th century, Einstein overturned the principles of physics by rejecting Isaac Newton's theory of gravity because it conflicted with his discovery that nothing travels faster than the speed of light. "So many of us," Greene says, "revere [Einstein], but it needs to be said - because I've seen it reported in an odd way - that we don't revere Einstein like some gurus of New Age cults may be revered, or some religious leaders. We are constantly critical of everyone's contributions, even Witten's. We look at a given paper, we bang it around, knock it, try to break it." The same goes for string theory, which could turn out to be completely wrong. "It's a highly speculative subject, but I don't shrink from that," he says. "If you ask me: 'Do I believe in string theory?' The answer is: no, I don't." Do you still believe that "the distinction between past, present, and future is only an illusion", Brian Greene? http://www.nytimes.com/2004/01/01/op...t-we-knew.html Brian Greene: "In the early part of the 20th century, however, Albert Einstein saw through nature's Newtonian facade and revealed that the passage of time depends on circumstance and environment. He showed that the wris****ches worn by two individuals moving relative to one another, or experiencing different gravitational fields, tick off time at different rates. The passage of time, according to Einstein, is in the eye of the beholder. (...) Rudolf Carnap, the philosopher, recounts Einstein's telling him that ''the experience of the now means something special for man, something essentially different from the past and the future, but this important difference does not and cannot occur within physics.'' And later, in a condolence letter to the widow of Michele Besso, his longtime friend and fellow physicist, Einstein wrote: ''In quitting this strange world he has once again preceded me by just a little. That doesn't mean anything. For we convinced physicists the distinction between past, present, and future is only an illusion, however persistent.'' (...) Now, however, modern physics' notion of time is clearly at odds with the one most of us have internalized. Einstein greeted the failure of science to confirm the familiar experience of time with ''painful but inevitable resignation.'' The developments since his era have only widened the disparity between common experience and scientific knowledge. Most physicists cope with this disparity by compartmentalizing: there's time as understood scientifically, and then there's time as experienced intuitively. For decades, I've struggled to bring my experience closer to my understanding. In my everyday routines, I delight in what I know is the individual's power, however imperceptible, to affect time's passage. In my mind's eye, I often conjure a kaleidoscopic image of time in which, with every step, I further fracture Newton's pristine and uniform conception. And in moments of loss I've taken comfort from the knowledge that all events exist eternally in the expanse of space and time, with the partition into past, present and future being a useful but subjective organization." Pentcho Valev |
#3
|
|||
|
|||
![]()
http://www.amazon.com/Relativity-Sim.../dp/0415701740
Einstein, Relativity and Absolute Simultaneity (Routledge Studies in Contemporary Philosophy) "Einstein, Relativity and Absolute Simultaneity is an anthology of original essays by an international team of leading philosophers and physicists who, on the centenary of Albert Einsteins Special Theory of Relativity, come together in this volume to reassess the contemporary paradigm of the relativistic concept of time. A great deal has changed since 1905 when Einstein proposed his Special Theory of Relativity, and this book offers a fresh reassessment of Special Relativitys relativistic concept of time in terms of epistemology, metaphysics and physics. There is no other book like this available; hence philosophers and scientists across the world will welcome its publication." "UNFORTUNATELY FOR EINSTEIN'S SPECIAL RELATIVITY, HOWEVER, ITS EPISTEMOLOGICAL AND ONTOLOGICAL ASSUMPTIONS ARE NOW SEEN TO BE QUESTIONABLE, UNJUSTIFIED, FALSE, PERHAPS EVEN ILLOGICAL." Craig Callender: "In my opinion, by far the best way for the tenser to respond to Putnam et al is to adopt the Lorentz 1915 interpretation of time dilation and Fitzgerald contraction. Lorentz attributed these effects (and hence the famous null results regarding an aether) to the Lorentz invariance of the dynamical laws governing matter and radiation, not to spacetime structure. On this view, Lorentz invariance is not a spacetime symmetry but a dynamical symmetry, and the special relativistic effects of dilation and contraction are not purely kinematical. The background spacetime is Newtonian or neo- Newtonian, not Minkowskian. Both Newtonian and neo-Newtonian spacetime include a global absolute simultaneity among their invariant structures (with Newtonian spacetime singling out one of neo-Newtonian spacetimes many preferred inertial frames as the rest frame). On this picture, there is no relativity of simultaneity and spacetime is uniquely decomposable into space and time." http://www.sciencenewsdigital.org/sc...913?pg=30#pg29 "Einstein introduced a new notion of time, more radical than even he at first realized. In fact, the view of time that Einstein adopted was first articulated by his onetime math teacher in a famous lecture delivered one century ago. That lecture, by the German mathematician Hermann Minkowski, established a new arena for the presentation of physics, a new vision of the nature of reality redefining the mathematics of existence. The lecture was titled Space and Time, and it introduced to the world the marriage of the two, now known as spacetime. It was a good marriage, but lately physicists passion for spacetime has begun to diminish. And some are starting to whisper about possible grounds for divorce. (...) Physicists of the 21st century therefore face the task of finding the true reality obscured by the spacetime mirage. (...) What he and other pioneers on the spacetime frontiers have seen coming is an intellectual crisis. The approaches of the past seem insufficiently powerful to meet the challenges remaining from Einstein's century - such as finding a harmonious mathematical marriage for relativity with quantum mechanics the way Minkowski unified space and time. And more recently physicists have been forced to confront the embarrassment of not knowing what makes up the vast bulk of matter and energy in the universe. They remain in the dark about the nature of the dark energy that drives the universe to expand at an accelerating rate. Efforts to explain the dark energy's existence and intensity have been ambitious but fruitless. To Albrecht, the dark energy mystery suggests that it's time for physics to drop old prejudices about how nature's laws ought to be and search instead for how they really are. And that might mean razing Minkowski's arena and rebuilding it from a new design. It seems to me like it's a time in the development of physics, says Albrecht, where it's time to look at how we think about space and time very differently." http://www.telegraph.co.uk/arts/main...11/bosmo10.xml "Smolin admits that "we have made no real headway". "We have failed," he says. "It has produced a crisis in physics." (...) EINSTEIN MAY HAVE STARTED THE ROT." http://www.logosjournal.com/issue_4.3/smolin.htm Lee Smolin: "Special relativity was the result of 10 years of intellectual struggle, yet Einstein had convinced himself it was wrong within two years of publishing it." http://www.pitt.edu/~jdnorton/papers...UP_TimesNR.pdf John Norton: "Already in 1907, a mere two years after the completion of the special theory, he [Einstein] had concluded that the speed of light is variable in the presence of a gravitational field." http://en.wikisource.org/wiki/The_De...e_of_Radiation "The Development of Our Views on the Composition and Essence of Radiation", Albert Einstein, 1909 "A large body of facts shows undeniably that light has certain fundamental properties that are better explained by Newton's emission theory of light than by the oscillation theory. For this reason, I believe that the next phase in the development of theoretical physics will bring us a theory of light that can be considered a fusion of the oscillation and emission theories. The purpose of the following remarks is to justify this belief and to show that a profound change in our views on the composition and essence of light is imperative.....Then the electromagnetic fields that make up light no longer appear as a state of a hypothetical medium, but rather as independent entities that the light source gives off, just as in Newton's emission theory of light......Relativity theory has changed our views on light. Light is conceived not as a manifestation of the state of some hypothetical medium, but rather as an independent entity like matter. Moreover, this theory shares with the corpuscular theory of light the unusual property that light carries inertial mass from the emitting to the absorbing object." http://hyperphysics.phy-astr.gsu.edu.../bugrivet.html "The bug-rivet paradox is a variation on the twin paradox and is similar to the pole-barn paradox.....The end of the rivet hits the bottom of the hole before the head of the rivet hits the wall. So it looks like the bug is squashed.....All this is nonsense from the bug's point of view. The rivet head hits the wall when the rivet end is just 0.35 cm down in the hole! The rivet doesn't get close to the bug....The paradox is not resolved." http://www.edge.org/q2008/q08_5.html John Baez: "On the one hand we have the Standard Model, which tries to explain all the forces except gravity, and takes quantum mechanics into account. On the other hand we have General Relativity, which tries to explain gravity, and does not take quantum mechanics into account. Both theories seem to be more or less on the right track but until we somehow fit them together, or completely discard one or both, OUR PICTURE OF THE WORLD WILL BE DEEPLY SCHIZOPHRENIC. (...) I realized I didn't have enough confidence in either theory to engage in these heated debates. I also realized that there were other questions to work on: questions where I could actually tell when I was on the right track, questions where researchers cooperate more and fight less. So, I eventually decided to quit working on quantum gravity." http://www.festival-astronomie.com/m...s-sciences.php Jean-Marc LEVY-LEBLOND: "Grandeur et misère de l'aventure scientifique. Au cours des 20 dernières années, le rôle de la science dans la société a profondément changé. Cette évolution récente tient à une transformation sans équivalent depuis la Révolution scientifique du début du XVIIéme siécle. Nous nous trouvons aujourd'hui dans une situation paradoxale où le poids de lactivité scientifique et son efficacité technique sans précédent mettent en cause ses fondement mêmes, et menacent sa dimension intellectuelle et culturelle au profit de sa seule utilité pratique et marchande." Marc LACHIEZE-REY: "LA PHYSIQUE EST-ELLE DEVENUE SCHIZOPHRÈNE ? La physique fondamentale repose sur deux découvertes du début du XXème siècle : la (physique) quantique et la relativité. Celles-ci s'appliquent à des domaines différents : le monde microscopique (essentiellement) pour la quantique ; les grandes échelles de l'espace pour la relativité. Les approximations de ces deux théories se confondent grosso modo pour la pratique de la physique de tous les jours. Pourtant, elles impliquent deux visions du monde différentes et parfois opposées : Par ailleurs chacun des deux ensembles théoriques présente ses propres problèmes." Pentcho Valev |
#4
|
|||
|
|||
![]()
If you are not just one of Einsteiniana's hymn-singing zombies, the
fact that your DEDUCTIVE science is based on a false axiom (Einstein's 1905 constant-speed-of-light postulate) would be your eternal source of guilty conscience. So Einsteinians have always been haunted by the dream of some variable-speed-of-light approach, an approach that would allow new Einsteins to gloriously develop Divine Albert's Divine Theory and eventually become greater than the original Einstein: http://www.prospect-magazine.co.uk/a...ls.php?id=5538 Paul Davies: "Was Einstein wrong? Einstein's famous equation E=mc2 is the only scientific formula known to just about everyone. The "c" here stands for the speed of light. It is one of the most fundamental of the basic constants of physics. Or is it? In recent years a few maverick scientists have claimed that the speed of light might not be constant at all. Shock, horror! Does this mean the next Great Revolution in Science is just around the corner?" http://discovermagazine.com/2003/apr/cover "Was Einstein Wrong? What if Einstein was wrong? The day João Magueijo began to doubt Albert Einstein started inauspiciously. It was a rainy winter morning in 1995 at Cambridge University, where Magueijo was a research fellow in theoretical physics. He was tramping across a sodden soccer field, suffering from a hangover and mumbling to himself, when out of the gray a heretical idea brought him to a full stop: What if Einstein was wrong? What if, rather than being forever constant, the speed of light could change? Magueijo stood there in the downpour. What would that mean?" http://www.rense.com/general13/ein.htm Einstein's Theory Of Relativity Must Be Rewritten By Jonathan Leake, Science Editor The Sunday Times - London "A group of astronomers and cosmologists has warned that the laws thought to govern the universe, including Albert Einstein's theory of relativity, must be rewritten. The group, which includes Professor Stephen Hawking and Sir Martin Rees, the astronomer royal, say such laws may only work for our universe but not in others that are now also thought to exist. "It is becoming increasingly likely that the rules we had thought were fundamental through time and space are actually just bylaws for our bit of it," said Rees, whose new book, Our Cosmic Habitat, is published next month. "Creation is emerging as even stranger than we thought." Among the ideas facing revision is Einstein's belief that the speed of light must always be the same - 186,000 miles a second in a vacuum. There is growing evidence that light moved much faster during the early stages of our universe. Rees, Hawking and others are so concerned at the impact of such ideas that they recently organised a private conference in Cambridge for more than 30 leading cosmologists." http://query.nytimes.com/gst/fullpag...pagewanted=all "As propounded by Einstein as an audaciously confident young patent clerk in 1905, relativity declares that the laws of physics, and in particular the speed of light -- 186,000 miles per second -- are the same no matter where you are or how fast you are moving. Generations of students and philosophers have struggled with the paradoxical consequences of Einstein's deceptively simple notion, which underlies all of modern physics and technology, wrestling with clocks that speed up and slow down, yardsticks that contract and expand and bad jokes using the word ''relative.''......''Perhaps relativity is too restrictive for what we need in quantum gravity,'' Dr. Magueijo said. ''We need to drop a postulate, perhaps the constancy of the speed of light.'' http://www.fqxi.org/data/articles/Se...lden_Spike.pdf "Loop quantum gravity also makes the heretical prediction that the speed of light depends on its frequency. That prediction violates special relativity, Einstein's rule that light in a vacuum travels at a constant speed for all observers..." http://www.edge.org/3rd_culture/smol...n03_print.html Lee Smolin: "Now, here is the really interesting part: Some of the effects predicted by the theory appear to be in conflict with one of the principles of Einstein's special theory of relativity, the theory that says that the speed of light is a universal constant. It's the same for all photons, and it is independent of the motion of the sender or observer. How is this possible, if that theory is itself based on the principles of relativity? The principle of the constancy of the speed of light is part of special relativity, but we quantized Einstein's general theory of relativity.....But there is another possibility. This is that the principle of relativity is preserved, but Einstein's special theory of relativity requires modification so as to allow photons to have a speed that depends on energy. The most shocking thing I have learned in the last year is that this is a real possibility. A photon can have an energy-dependent speed without violating the principle of relativity! This was understood a few years ago by Amelino Camelia. I got involved in this issue through work I did with Joao Magueijo, a very talented young cosmologist at Imperial College, London. During the two years I spent working there, Joao kept coming to me and bugging me with this problem.....These ideas all seemed crazy to me, and for a long time I didn't get it. I was sure it was wrong! But Joao kept bugging me and slowly I realized that they had a point. We have since written several papers together showing how Einstein's postulates may be modified to give a new version of special relativity in which the speed of light can depend on energy." Yet the variable-speed-of-light approach has proved extremely dangerous. In physics, if the postulate is false, the whole deductive superstructure is false. Even Divine Albert knew this: "If the speed of light is the least bit affected by the speed of the light source, then my whole theory of relativity and theory of gravity is false. " - Albert Einstein So Einsteinians abandoned the variable-speed-of-light approach eventually. Still guilty conscience continues to torture their minds. At present Einsteinians alleviate it by vigorously rejecting the consequences of Einstein's 1905 false constant-speed-of-light postulate (referring to the falsehood of the postulate being absolutely taboo): http://www.humanamente.eu/PDF/Issue13_Paper_Norton.pdf John Norton: "It is common to dismiss the passage of time as illusory since its passage has not been captured within modern physical theories. I argue that this is a mistake. Other than the awkward fact that it does not appear in our physics, there is no indication that the passage of time is an illusion." http://www.fqxi.org/community/articles/display/148 "Many physicists argue that time is an illusion. Lee Smolin begs to differ. (...) Smolin wishes to hold on to the reality of time. But to do so, he must overcome a major hurdle: General and special relativity seem to imply the opposite. In the classical Newtonian view, physics operated according to the ticking of an invisible universal clock. But Einstein threw out that master clock when, in his theory of special relativity, he argued that no two events are truly simultaneous unless they are causally related. If simultaneity - the notion of "now" - is relative, the universal clock must be a fiction, and time itself a proxy for the movement and change of objects in the universe. Time is literally written out of the equation. Although he has spent much of his career exploring the facets of a "timeless" universe, Smolin has become convinced that this is "deeply wrong," he says. He now believes that time is more than just a useful approximation, that it is as real as our guts tell us it is - more real, in fact, than space itself. The notion of a "real and global time" is the starting hypothesis for Smolin's new work, which he will undertake this year with two graduate students supported by a $47,500 grant from FQXi." http://www.fqxi.org/community/articles/display/151 "The distinction between past, present and future is only a stubbornly persistent illusion." It was none other than Einstein who uttered these words. He was speaking about how our perception of time differs from the fundamental nature of time in physics. Take our perceptions first: We have a clear sense of the present moment, what came before, and what might come after. Unfortunately, physics treats time rather differently. Einstein's theory of special relativity presents us with a four-dimensional spacetime, in which the past, present and future are already mapped out. There is no special "now," just as there's no special "here." And just like spacetime does not have a fundamental direction - forcing us to move inexorably from east to west, say - time does not flow. "You have this big gap between the time of fundamental science and the time we experience," says Craig Callender, a philosopher at the University of California, San Diego. It's this gap that he has set out to narrow, using ideas from physics, evolutionary theory and cognitive science." http://hps.master.univ-paris7.fr/cours_du_temps.doc Etienne Klein: "Aujourd'hui, L'astrophysicien Thibault Damour développe à sa manière des idées qui vont dans le même sens. Selon lui, le temps qui passe (qu'il sagisse d'un fait ou de notre sentiment) est le produit de notre seule subjectivité, un effet que nous devrions au caractère irréversible de notre mise en mémoire, de sorte que la question du cours du temps relèverait non pas de la physique, mais des sciences cognitives. Il écrit : « De même que la notion de température n'a aucun sens si l'on considère un système constitué d'un petit nombre de particules, de même il est probable que la notion d'écoulement du temps n'a de sens que pour certains systèmes complexes, qui évoluent hors de l'équilibre thermodynamique, et qui gèrent d'une certaine façon les informations accumulées dans leur mémoire. » Le temps ne serait donc qu'une apparence d'ordre psychologique : « Dans le domaine d'espace-temps que nous observons, poursuit-il, nous avons l'impression qu'il s'écoule "du bas vers le haut" de l'espace-temps, alors qu'en réalité ce dernier constitue un bloc rigide qui n'est nullement orienté a priori : il ne le devient que pour nous [35]. » L'existence même d'un « cours du temps », ou d'un « passage du temps », n'est ainsi que simple apparence pour de nombreux physiciens contemporains. Certains vont même jusqu'à considérer le passage du temps comme une pure illusion, comme un produit culturel abusivement dérivé de la métaphore du fleuve. C'est en effet la conception dite de l'« univers-bloc » qui semble avoir les faveurs d'une majorité de physiciens. Dans le droit fil de la théorie de la relativité, celle-ci consiste à invoquer un univers constitué d'un continuum d'espace-temps à quatre dimensions, privé de tout flux temporel : tous les événements, qu'ils soient passés, présents et futurs, ont exactement la même réalité, de la même façon que différents lieux coexistent, en même temps et avec le même poids ontologique, dans l'espace. En d'autres termes, les notions de passé ou de futur ne sont que des notions relatives, comme celles d'Est et d'Ouest. En un sens, tout ce qui va exister existe déjà et tout ce qui a existé existe encore. L'espace-temps contient l'ensemble de l'histoire de la réalité comme la partition contient l'uvre musicale : la partition existe sous une forme statique, mais ce qu'elle contient, l'esprit humain l'appréhende généralement sous la forme d'un flux temporel." Pentcho Valev |
#5
|
|||
|
|||
![]()
http://www.nature.com/news/2005/0503...s050328-8.html
Philip Ball: "In general relativity, there is no such thing as a 'universal time' that makes clocks tick at the same rate everywhere. Instead, gravity makes clocks run at different rates in different places. But quantum mechanics, which describes physical phenomena at infinitesimally small scales, is meaningful only if time is universal; if not, its equations make no sense." http://www.amazon.com/Sun-Moon-Corru.../dp/1846271088 The Sun and Moon Corrupted Philip Ball: "Light was no longer a beautiful beam, a wave stretching from here to infinity. Light was quanta. Light was discrete. Light was particles. Call them photons. These photons won Einstein a Nobel Prize." http://www.nature.com/news/2008/0807....2008.933.html Philip Ball: "Effective field theories are a way of not having to answer everything at once. But if they simply mount up into an infinite tower, it will be an ungainly edifice at best. As philosopher of science Stephan Hartmann at Tilburg University in the Netherlands has put it, the predictive power of such a composite theory would steadily diminish "just as the predictive power of the Ptolemaic system went down when more epicycles were added". Einstein seemed to have an intimation of this. He expressed discomfort that his theory of relativity was based not simply on known facts but on an a priori postulate about the speed of light. He seemed to sense that this made it less fundamental." Philip Ball, some day your guilty conscience will force you to extract valuable information about the speed of light from two important confessions: Einstein's 1954 confession and Banesh Hoffmann's confession: http://www.perimeterinstitute.ca/ind...ecture_id=3576 John Stachel: "Einstein discussed the other side of the particle-field dualism - get rid of fields and just have particles." EINSTEIN'S 1954 CONFESSION: "I consider it entirely possible that physics cannot be based upon the field concept, that is on continuous structures. Then nothing will remain of my whole castle in the air, including the theory of gravitation, but also nothing of the rest of contemporary physics." John Stachel's comment: "If I go down, everything goes down, ha ha, hm, ha ha ha." http://www.amazon.com/Relativity-Its.../dp/0486406768 "Relativity and Its Roots" By Banesh Hoffmann "Moreover, if light consists of particles, as Einstein had suggested in his paper submitted just thirteen weeks before this one, the second principle seems absurd: A stone thrown from a speeding train can do far more damage than one thrown from a train at rest; the speed of the particle is not independent of the motion of the object emitting it. And if we take light to consist of particles and assume that these particles obey Newton's laws, they will conform to Newtonian relativity and thus automatically account for the null result of the Michelson-Morley experiment without recourse to contracting lengths, local time, or Lorentz transformations. Yet, as we have seen, Einstein resisted the temptation to account for the null result in terms of particles of light and simple, familiar Newtonian ideas, and introduced as his second postulate something that was more or less obvious when thought of in terms of waves in an ether." Pentcho Valev |
#6
|
|||
|
|||
![]()
Gatekeepers of professional physics shed crocodile tears but still
some guilty conscience is beginning to emerge: http://www.place-publique.fr/spip.php?article6280 "On observe ces dernières années une désertion des filières scientifiques qui témoigne du déclin de la formation scientifique des jeunes. (...) Les questions posées avec le plus d’insistance par les jeunes mais aussi les moins jeunes concernent les liens entre science et pouvoir, entre science et démocratie. C’est ce que souligne une étude menée par Etienne Klein... (...) Les sciences et les techniques sont devenues un sujet politique, au sens large et de manière prosaïque, une sorte de boite noire. « Il existe un sentiment de désinformation et de dépossession démocratique du débat sciences/ société, souligne ce rapport. La science est perçue comme un instrument de pouvoir dont l'effet advient de façon déterministe »." http://www.dogma.lu/txt/EK-ScienceQuiestion.htm Etienne Klein: "Votre science dit-elle réellement le vrai ? Comment osez-vous prétendre qu'elle se réfère à la rationalité alors que les jugements esthétiques, les préjugés métaphysiques et autres désirs subjectifs imprégnent sinon sa démarche tout entière, du moins certaines de ses phases ? Votre légitimité incontestée est-elle fondée sur autre chose que des effets de pouvoir ? Les mythes, que vous méprisez, ne disent-ils pas eux aussi une part de la vérité ? Le relativisme bénéficie, sous toutes ses formes, d'une sympathie intellectuelle quasi-spontanée. Pourquoi séduit-il tant ceux qui s'interrogent sur la portée des discours de la science ? Sans doute parce que, abusivement interprété comme une remise en cause des prétentions de cette dernière, il semble nourrir un soupçon qui se généralise, celui de l'imposture : « Finalement, (là comme ailleurs) tout est relatif. » (...) Comment inciter ceux qui ne connaissent pas la science à vouloir la connaître ? Comment convertir le droit de savoir, légitime mais gratuit en termes d'effort, en désir de connaître, qui, lui, demande un engagement chronophage et un véritable travail personnel ? Et comment inciter les moins intéressés d'entre nous à se tourner vers les scientifiques pour les questionner : " Que faites-vous au juste ? Que savez-vous exactement ? En quoi ce que vous proposez est-il pertinent pour nous ? " Réciproquement, comment obliger les experts à ne plus s'en tenir à leurs seules propres raisons et à écouter celles des autres ?" http://archives.lesechos.fr/archives...077-80-ECH.htm "Physicien au CEA, professeur et auteur, Etienne Klein s'inquiète des relations de plus en plus conflictuelles entre la science et la société. (...) « Je me demande si nous aurons encore des physiciens dans trente ou quarante ans », remarque ce touche-à-tout aux multiples centres d'intérêt : la constitution de la matière, le temps, les relations entre science et philosophie. (...) Etienne Klein n'est pas optimiste. Selon lui, il se pourrait bien que l'idée de progrès soit tout bonnement « en train de mourir sous nos yeux »." Guilty conscience par excellence: http://hps.master.univ-paris7.fr/cours_du_temps.doc Etienne Klein: "Aujourd'hui, L'astrophysicien Thibault Damour développe à sa manière des idées qui vont dans le même sens. Selon lui, le temps qui passe (qu'il sagisse d'un fait ou de notre sentiment) est le produit de notre seule subjectivité, un effet que nous devrions au caractère irréversible de notre mise en mémoire, de sorte que la question du cours du temps relèverait non pas de la physique, mais des sciences cognitives. Il écrit : « De même que la notion de température n'a aucun sens si l'on considère un système constitué d'un petit nombre de particules, de même il est probable que la notion d'écoulement du temps n'a de sens que pour certains systèmes complexes, qui évoluent hors de l'équilibre thermodynamique, et qui gèrent d'une certaine façon les informations accumulées dans leur mémoire. » Le temps ne serait donc qu'une apparence d'ordre psychologique : « Dans le domaine d'espace-temps que nous observons, poursuit-il, nous avons l'impression qu'il s'écoule "du bas vers le haut" de l'espace-temps, alors qu'en réalité ce dernier constitue un bloc rigide qui n'est nullement orienté a priori : il ne le devient que pour nous [35]. » L'existence même d'un « cours du temps », ou d'un « passage du temps », n'est ainsi que simple apparence pour de nombreux physiciens contemporains. Certains vont même jusqu'à considérer le passage du temps comme une pure illusion, comme un produit culturel abusivement dérivé de la métaphore du fleuve. C'est en effet la conception dite de l'« univers-bloc » qui semble avoir les faveurs d'une majorité de physiciens. Dans le droit fil de la théorie de la relativité, celle-ci consiste à invoquer un univers constitué d'un continuum d'espace-temps à quatre dimensions, privé de tout flux temporel : tous les événements, qu'ils soient passés, présents et futurs, ont exactement la même réalité, de la même façon que différents lieux coexistent, en même temps et avec le même poids ontologique, dans l'espace. En d'autres termes, les notions de passé ou de futur ne sont que des notions relatives, comme celles d'Est et d'Ouest. En un sens, tout ce qui va exister existe déjà et tout ce qui a existé existe encore. L'espace-temps contient l'ensemble de l'histoire de la réalité comme la partition contient l'uvre musicale : la partition existe sous une forme statique, mais ce qu'elle contient, l'esprit humain l'appréhende généralement sous la forme d'un flux temporel." A honest acccount of the problem: http://www.informaworld.com/smpp/con...ent=a909857880 Peter Hayes "The Ideology of Relativity: The Case of the Clock Paradox" : Social Epistemology, Volume 23, Issue 1 January 2009, pages 57-78 Peter Hayes: "The prediction that clocks will move at different rates is particularly well known, and the problem of explaining how this can be so without violating the principle of relativity is particularly obvious. The clock paradox, however, is only one of a number of simple objections that have been raised to different aspects of Einstein's theory of relativity. (Much of this criticism is quite apart from and often predates the apparent contradiction between relativity theory and quantum mechanics.) It is rare to find any attempt at a detailed rebuttal of these criticisms by professional physicists. However, physicists do sometimes give a general response to criticisms that relativity theory is syncretic by asserting that Einstein is logically consistent, but that to explain why is so difficult that critics lack the capacity to understand the argument. In this way, the handy claim that there are unspecified, highly complex resolutions of simple apparent inconsistencies in the theory can be linked to the charge that antirelativists have only a shallow understanding of the matter, probably gleaned from misleading popular accounts of the theory. The claim that the theory of relativity is logically consistent for reasons that are too complex for non-professionals to grasp is not only convenient, but is rhetorically unassailable - as whenever a critic disproves one argument, the professional physicist can allude to another more abstruse one. Einstein's transformation of the clock paradox from a purported expression of the special theory to a purported expression of the much more complicated general theory is one example of such a defence. (...) The defence of complexity implies that the novice wishing to enter the profession of theoretical physics must accept relativity on faith. It implicitly concedes that, without an understanding of relativity theory's higher complexities, it appears illogical, which means that popular "explanations" of relativity are necessarily misleading. But given Einstein's fame, physicists do not approach the theory for the first time once they have developed their expertise. Rather, they are exposed to and probably examined on popular explanations of relativity in their early training. How are youngsters new to the discipline meant to respond to these accounts? Are they misled by false explanations and only later inculcated with true ones? What happens to those who are not misled? Are they supposed to accept relativity merely on the grounds of authority? The argument of complexity suggests that to pass the first steps necessary to join the physics profession, students must either be willing to suspend disbelief and go along with a theory that appears illogical; or fail to notice the apparent inconsistencies in the theory; or notice the inconsistencies and maintain a guilty silence in the belief that this merely shows that they are unable to understand the theory. The gatekeepers of professional physics in the universities and research institutes are disinclined to support or employ anyone who raises problems over the elementary inconsistencies of relativity. A winnowing out process has made it very difficult for critics of Einstein to achieve or maintain professional status. Relativists are then able to use the argument of authority to discredit these critics. Were relativists to admit that Einstein may have made a series of elementary logical errors, they would be faced with the embarrassing question of why this had not been noticed earlier. Under these circumstances the marginalisation of antirelativists, unjustified on scientific grounds, is eminently justifiable on grounds of realpolitik. Supporters of relativity theory have protected both the theory and their own reputations by shutting their opponents out of professional discourse." Pentcho Valev |
#7
|
|||
|
|||
![]()
Guilty conscience par excellence:
http://www.panchamama.net/Einstein-aujourd-hui.pdf Olivier Darrigol: "Einstein cessa de s'interroger sur la possibilité éventuelle d'effets du vent d'éther et admit le principe de relativité. Contrairement à Poincaré (mais comme Bucherer), il décida de rejeter l'éther devenu complètement indétectable et d'admettre que la vitesse de la lumière dépendait de la vitesse de sa source, comme elle l'aurait fait dans une théorie corpusculaire newtonienne. Ce point de vue, développé par Walter Ritz en 1908, satisfait immédiatement au principe de relativité et permet de retrouver la plupart des résultats de l'électrodynamique de Lorentz, dans la mesure où les actions d'une source sont décrites par une expression modifiée des potentiels retardés tenant compte du mouvement de la source. Mais au bout d'un certain temps, Einstein se persuada que ce point de vue conduisait à des effets paradoxaux d'auto-couplage. Le dilemme de l'électrodynamique des corps en mouvement restait donc entier : si la vitesse de la lumière avait une valeur constante, indépendante de sa source (comme le suggérait la théorie de Lorentz), alors d'après le principe de relativité cette constante devait être la même dans tout référentiel inertiel, contrairement à la loi galiléenne d'addition des vitesses." Olivier Darrigol, ces "effets paradoxaux d'auto-couplage", c'est sérieux? Vous en croyez? Pourquoi est-ce que Banesh Hoffmann n'en parle pas? http://www.decitre.fr/livres/La-rela.../9782842450199 Banesh Hoffmann, "La relativité, histoire d'une grande idée", Pour la Science, Paris, 1999, p. 112: "De plus, si l'on admet que la lumière est constituée de particules, comme Einstein l'avait suggéré dans son premier article, 13 semaines plus tôt, le second principe parait absurde: une pierre jetée d'un train qui roule très vite fait bien plus de dégâts que si on la jette d'un train a l'arrêt. Or, d'après Einstein, la vitesse d'une certaine particule ne serait pas indépendante du mouvement du corps qui l'émet! Si nous considérons que la lumière est composée de particules qui obéissent aux lois de Newton, ces particules se conformeront à la relativité newtonienne. Dans ce cas, il n'est pas nécessaire de recourir à la contraction des longueurs, au temps local ou à la transformation de Lorentz pour expliquer l'échec de l'expérience de Michelson-Morley. Einstein, comme nous l'avons vu, résista cependant à la tentation d'expliquer ces échecs à l'aide des idées newtoniennes, simples et familières. Il introduisit son second postulat, plus ou moins évident lorsqu'on pensait en termes d'ondes dans l'éther." Pentcho Valev |
#8
|
|||
|
|||
![]()
In Einsteiniana's schizophrenic world guilty conscience is always
combined with ideas of more efficient camouflage: http://www.pantaneto.co.uk/issue33/henry.htm Henry A. Rowland Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, Maryland Richard Conn Henry: "How grotesquely badly we teach special relativity encapsulates the practical problem of teaching physics to the freshman physics major. I have never found a single freshman physics textbook that teaches Minkowski spacetime; I have never found a single text on General Relativity that mentions "Einstein's two postulates." Every physics freshman is taught ... well, let me quote an example. In the fall of 2007 I will, for the second time in my career, teach introductory physics for physical science majors at the Johns Hopkins University. One text that has recently been used for that course is "University Physics," by R. L. Reese. On page 1155 we read "The entire special theory stems from only two postulates. ... Postulate 1: The speed of light in a vacuum has the same numerical value c when measured in any inertial reference frame, independent of the motion of the source and/or observer."... Postulate 2: The fundamental laws of physics must be the same in all inertial reference frames." The reader is invited to recoil, not only at the bizarre re-numbering of the infamous two postulates, but of course at the use of the postulates at all. There is no doubt that, historically, Albert Einstein, in 1905, did introduce two postulates (and also, that it is he who discovered special relativity). But the second of these postulates (the one concerning the constancy of c, just in case Reese has confused you!) did not survive the year. In September of 1905 Einstein published a development from relativity—the discovery of the implication that E = mc2 , and in this new paper he mentions a single postulate only. But the paper contains a sweet footnote: "The principle of the constancy of the velocity of light is of course contained in Maxwell's equations." How I love that "of course!" Einstein was human! I do not know if it is true, but I recall being told that during the Middle Ages undergraduates learned to multiply and divide using Roman numerals, while the exotic Arabic numerals were reserved for the more advanced students. That is exactly what we do today in teaching special relativity. Antique postulates that are not of anything but historical interest to genuine physicists are presented to students as "Special Relativity." Some books do better than others in warning students how seemingly impossible the second postulate is; but all have the students working out true but unintuitive consequences (e.g. relativity of simultaneity) using thought experiments with of course the second postulate producing the bizarre result. A small number of texts (Ohanian, Knight, a few others) at least follow Einstein's second paper in having but a single postulate; but none do what needs to be done, which is to drop Einstein and adopt Minkowski." Pentcho Valev |
Thread Tools | |
Display Modes | |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
SANITY IN EINSTEINIANA'S SCHISOPHRENIC WORLD | Pentcho Valev | Astronomy Misc | 11 | June 8th 11 08:43 AM |
EINSTEINIANA'S SCHIZOPHRENIC WORLD | Pentcho Valev | Astronomy Misc | 14 | June 8th 11 08:08 AM |
ROYAL SOCIETY'S GUILTY CONSCIENCE | Pentcho Valev | Astronomy Misc | 1 | June 4th 10 08:53 AM |
GUILTY CONSCIENCE IN EINSTEINIANA | Pentcho Valev | Astronomy Misc | 0 | October 20th 09 06:52 AM |
HOW EINSTEINIANS CAN LEAVE THEIR SCHIZOPHRENIC WORLD | Pentcho Valev | Astronomy Misc | 4 | July 22nd 09 09:56 AM |