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On Jul 29, 5:00*pm, moky wrote:
http://users.ox.ac.uk/~tweb/00001/ Roger Penrose: "I had, for a good many years earlier, been of the opinion that the SPACE-TIME CONTINUUM picture of reality would prove inadequate on some small scale." http://www.perimeterinstitute.ca/pdf...09145525ca.pdf Albert Einstein: "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." Just in order to answer in a scientific way : Look at the page 574 he http://www.alainconnes.org/docs/book94bigpdf.pdf That describes a model in which the space is not continuous, and which embed, however, the Einstein's gravitation. More generally, look at page 196 he http://www.alainconnes.org/docs/bookwebfinal.pdf Of course, non commutative gegometry is only one way out of 10.000 to extend general relativity using non-continuous spaces. An other is quantum loop gravity : http://xxx.lanl.gov/abs/gr-qc/9905087v1 What you point out is only the fact that Einstein has not the mathematical tools to express his theory in a non-continuous space- time. Now we have. Does it answer you concern ? The dilemma "continuous field - discontinuous particles" is PHYSICAL, not mathematical: http://www.academie-sciences.fr/memb...tein_eloge.pdf Louis de Broglie: "Tout d'abord toute idée de "grain" se trouvait expulsée de la théorie de la Lumière : celle-ci prenait la forme d'une "théorie du champ" où le rayonnement était représenté par une répartition continue dans l'espace de grandeurs évoluant continûment au cours du temps sans qu'il fût possible de distinguer, dans les domaines spatiaux au sein desquels évoluait le champ lumineux, de très petites régions singulières où le champ serait très fortement concentré et qui fournirait une image du type corpusculaire. Ce caractère à la fois continu et ondulatoire de la lumière se trouvait prendre une forme très précise dans la théorie de Maxwell où le champ lumineux venait se confondre avec un certain type de champ électromagnétique." In 1905 Einstein in fact killed contemporary physics (see the quotation above) by basing his light postulate on "continuous field", not on "discontinuous particles": http://books.google.com/books?id=JokgnS1JtmMC "Relativity and Its Roots" By Banesh Hoffmann p.92: "There are various remarks to be made about this second principle. For instance, if it is so obvious, how could it turn out to be part of a revolution - especially when the first principle is also a natural one? 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. If it was so obvious, though, why did he need to state it as a principle? Because, having taken from the idea of light waves in the ether the one aspect that he needed, he declared early in his paper, to quote his own words, that "the introduction of a 'luminiferous ether' will prove to be superfluous." Pentcho Valev |
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![]() The dilemma "continuous field - discontinuous particles" is PHYSICAL, not mathematical: You did not even read what I send. Solutions to physical problems often come from new mathematical structures : description of the planet orbits by Newton's gravitation is due to differential calculus, Maxwell's electrodynamics is due to vector calculus and Stockes's theorem, and so on. Now, there exists mathematical frameworks in which one can write physical theories that embed general relativity in a non-continuous space-time. The physical question is : are these theories good or not ? So far, we do not have any answer to that question. Here, Alain Connes and Ali Chamseddine make a prediction for the Higgs' mass. http://xxx.lanl.gov/pdf/hep-th/9606001 Wait and see ... By the way : string theory (the XXI century physics), as far as I know, takes place in continuous space-time ... but some noncommutative structures do appear. Do not forget to say if Lorentz is correct in the flat case http://groups.google.fr/group/fr.sci...c07d03bfd85ca& http://groups.google.fr/group/fr.sci...fdc42e9464510a http://groups.google.fr/group/fr.sci...b8d7306?hl=fr& Good afternoon Laurent |
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On Jul 29, 6:20*pm, moky wrote:
The dilemma "continuous field - discontinuous particles" is PHYSICAL, not mathematical: You did not even read what I send. Solutions to physical problems often come from new mathematical structures : description of the planet orbits by Newton's gravitation is due to differential calculus, Maxwell's electrodynamics is due to vector calculus and Stockes's theorem, and so on. I am afraid you are too confused and if your position in your university is not stable you should stop exposing your "thoughts". Just learn by rote Divine Albert's thoughts: http://www.astrofind.net/documents/t...radiation..php The Development of Our Views on the Composition and Essence of Radiation by Albert Einstein 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." Pentcho Valev |
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I am afraid you are too confused and if your position in your
university is not stable you should stop exposing your "thoughts". Do not worry for me. I repeat myself : You did not even read what I send. So, what are you discussing about ? 1. String theory is mainly conformal. The only fact you try to use it in order to say that Gallilée is good shows that you have no idea of the "21 century" physics, and in particular, no idea of what string theory is made of. 2. Quantum loo gravity and noncommutative geometry are two theories that are able to deal with discountinuous spaces in the same time as agreeing with general relativity. First, read something about, and then, discuss. So, you should stay at a correct level. In the non-gravitational case, is Lorentz correct ? (if you want to answer "no", you have to say that you was wrong in posting your string theorist link) Have a good night Laurent Once again, I do not care what Einstein was thinking about science development in 1905. This is surly interesting from an historical point of view, but now we have quantum mechanics and QED that deeply changed our understanding of light ... way more that all Einstein could imagine. |
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On Jul 29, 9:17*pm, moky wrote:
Once again, I do not care what Einstein was thinking about science development in 1905. This is surly interesting from an historical point of view, but now we have quantum mechanics and QED that deeply changed our understanding of light ... way more that all Einstein could imagine. But you also said Einstein's theory would remain true even if his 1905 light postulate is false: http://groups.google.com/group/fr.sc...9e5d9fabf69d18 Albert Einstein: "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." Laurent Claessens: "Eh bien, Einstein s'est trompé. C'est pour ça que je dis qu'il ne faut pas lire les textes originaux." Would you mind if from now on you are referred to as "Laurent Claessens, humble follower of the Great Relativists Tom Roberts, Jean- Marc Lévy-Leblond and Jong-Ping Hsu who gloriously proved that Divine Albert's Divine Special Relativity "would be unaffected" even if "light in vacuum does not travel at the invariant speed of the Lorentz transform": http://groups.google.ca/group/sci.ph...1ebdf49c012de2 Tom Roberts, Feb 1, 2006: "If it is ultimately discovered that the photon has a nonzero mass (i.e. light in vacuum does not travel at the invariant speed of the Lorentz transform), SR would be unaffected but both Maxwell's equations and QED would be refuted (or rather, their domains of applicability would be reduced)." http://o.castera.free.fr/pdf/chronogeometrie.pdf Jean-Marc Levy-Leblond "De la relativite à la chronogeometrie ou: Pour en finir avec le "second postulat" et autres fossiles": "D’autre part, nous savons aujourd’hui que l’invariance de la vitesse de la lumiere est une consequence de la nullite de la masse du photon. Mais, empiriquement, cette masse, aussi faible soit son actuelle borne superieure experimentale, ne peut et ne pourra jamais etre consideree avec certitude comme rigoureusement nulle. Il se pourrait meme que de futures mesures mettent en evidence une masse infime, mais non-nulle, du photon ; la lumiere alors n’irait plus à la "vitesse de la lumiere", ou, plus precisement, la vitesse de la lumiere, desormais variable, ne s’identifierait plus à la vitesse limite invariante. Les procedures operationnelles mises en jeu par le "second postulat" deviendraient caduques ipso facto. La theorie elle-meme en serait-elle invalidee ? Heureusement, il n'en est rien ; mais, pour s'en assurer, il convient de la refonder sur des bases plus solides, et d'ailleurs plus economiques. En verite, le "premier postulat" suffit, a la condition de l'exploiter a fond." http://o.castera.free.fr/pdf/onemorederivation.pdf Jean-Marc Levy-Leblond: "This is the point of view from wich I intend to criticize the overemphasized role of the speed of light in the foundations of the special relativity, and to propose an approach to these foundations that dispenses with the hypothesis of the invariance of c....We believe that special relativity at the present time stands as a universal theory discribing the structure of a common space-time arena in which all fundamental processes take place....The evidence of the nonzero mass of the photon would not, as such, shake in any way the validity of the special relativity. It would, however, nullify all its derivations which are based on the invariance of the photon velocity." http://www.amazon.com/Einsteins-Rela.../dp/9810238886 Jong-Ping Hsu: "...an unexpected affirmative answer to the long- standing question of whether it is possible to construct a relativity theory without postulating the constancy of the speed of light and retaining only the first postulate of special relativity. This question was discussed in the early years following the discovery of special relativity by many physicists, including Ritz, Tolman, Kunz, Comstock and Pauli, all of whom obtained negative answers." Pentcho Valev |
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On Jul 28, 10:48*pm, Pentcho Valev wrote:
Money in Einstein criminal cult goes mainly to Sir Martin and Sir Roger but from time to time small sums are given to extremely active zombies such as Zombie Kaku: http://blogs.physicstoday.org/wht/20..._kaku_and.html "Dr. Michio Kaku, Henry Semat Professor at the City College of New York, is the 2008 recipient of the Klopsteg Memorial Award from the American Association of Physics Teachers (AAPT)." Zombie Kaku teaches Einstein zombie world that teleportation, time travel, invisibility etc are possible and even carried out by experts in Einsteiniana: http://www.shortnews.com/start.cfm?id=69716 "Teleportation, Time Travel, Invisibility etc May be Possible. Kaku says that teleportation has already been carried out..." Zombie Kaku is incomparable: http://fr.youtube.com/watch?v=RnkE2y...eature=related More money should be given to Zombie Kaku. Pentcho Valev |
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Sir Martin thinks that Zombie Everitt has gone too far. Sir Martin
knows that Divine Albert's Divine Theory is an inconsistency and therefore can predict anything. How can one test a theory that predicts anything? Sir Martin suggests that Gravity Probe B should not waste money anymore. Zombie Everitt will never again sing "Divine Einstein": http://www.telegraph.co.uk/connected...ecfgravb28.xml "Did Einstein get all his sums right?.....Last week, an American probe began an 18-month mission to put Einstein's prediction to the test, 90 years after he unveiled his ideas in Berlin. Gravity Probe B was blasted into space from the Vandenberg Air Force Base in California on a Boeing Delta 2 rocket and will orbit the Earth for more than a year. The $700 million joint mission between Nasa and Stanford University, conceived in 1958, uses four of the most perfect spheres ever created inside the world's largest Thermos flask to detect minute distortions in the fabric of the universe.....Sir Martin Rees, the Astronomer Royal, said: "The project's a technical triumph, and a triumph of the persistence and lobbying power of Stanford University. But its gestation has been grotesquely prolonged, and the cost overruns have been equally gross. I recall hearing a talk about the project from Francis Everitt (principal investigator) when I was still a student – and it was already well advanced. "Back in the 1960s the evidence for Einstein's theory was meagre – just two tests, with 10 per cent precision. But relativity is now confirmed by several tests, with precision of one part in 10,000. It's still, in principle, good to have new and different tests. But the level of confidence in Einstein's theory is now so high that an announcement of the expected result will 'fork no lightening'. "Moreover, if there's an unexpected result, I suspect most people will suspect an error in this very challenging experiment rather than immediately abandon Einstein: There's now so much evidence corroborating Einstein, that a high burden of proof is required before he'll be usurped by any rival theory. "So the most exciting – if un-alluring – outcome of Gravity Probe B would be a request by Stanford University for another huge sum of money to repeat it." Pentcho Valev |
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![]() Pentcho Valev a écrit : On Jul 29, 9:17�pm, moky wrote: Once again, I do not care what Einstein was thinking about science development in 1905. This is surly interesting from an historical point of view, but now we have quantum mechanics and QED that deeply changed our understanding of light ... way more that all Einstein could imagine. But you also said Einstein's theory would remain true even if his 1905 light postulate is false: Even if light has not an invariant speed, the Lorentz group remains the correct one in the flat space. But, of course, QED would have to be modified (because in QED, the photon is the U(1) gauge boson, which is massless), or, more precisely, its domain of validity should be restricted. But, since you do not know one single word about QED (you do not even know what is a U(1) gauge boson and have no idea of why it is massless[1]), what do you expect to prove by discussing the corrections that would be done in order to give a mass to the photon ? That small parenthesis being closed, you can answer the questions : * In the non-gravitational case, is Lorentz correct ? * How do you do to, in the same time, claim that Gallilée is correct and that string theory is the 21 century physics ? The first question can be answered by "yes" or "no". I do not understand why you are delaying your answer by changing the subject everyday ... Have a good night. Laurent [1] I know that you do not know because anybody who knows what a gauge boson is knows what the spin representations of SL(2,C) are ... or at least the ones of Lorentz. |
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On Jul 30, 2:56*am, moky wrote:
Pentcho Valev a écrit : On Jul 29, 9:17 pm, moky wrote: Once again, I do not care what Einstein was thinking about science development in 1905. This is surly interesting from an historical point of view, but now we have quantum mechanics and QED that deeply changed our understanding of light ... way more that all Einstein could imagine. But you also said Einstein's theory would remain true even if his 1905 light postulate is false: Even if light has not an invariant speed, the Lorentz group remains the correct one in the flat space. You don't need to say anything else. Your place in the pantheon is guaranteed. Is Jean-Marc Lévy-Leblond the founder of your incredible school of thought? Pentcho Valev |
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You don't need to say anything else. Your place in the pantheon is
guaranteed. Is Jean-Marc Lévy-Leblond the founder of your incredible school of thought? No. I never heard about him. I just say what is taught at university. Inveriance under the Lorentz group is an hypothesis which independent of the light phenomenology. Only people like you ignore it, because you refuse to read what people explain you on the forum from years. Anyway, it does not answer the questions : * Is Lorentz correct at least in the non-gravitation case ? (Yes/no) * Do you think that string theory works in the gallilean framework ? (yes/no) Have a good night Laurent |
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