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Old March 25th 08, 06:27 AM posted to sci.physics.relativity,sci.physics,sci.astro,fr.sci.physique,fr.sci.maths
Pentcho Valev
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Posts: 8,078
Default Paradoxes

On Mar 24, 9:45*pm, Tom Roberts wrote in
sci.physics.relativity:
* * * * As I have often said around here, IMHO the foundation of
* * * * SR is merely as the local limit of GR (i.e. there's no need to
* * * * support Einstein's original postulates).


Bravo Roberts bravo Tom bravo Albert Einstein of our generation
(Hawking is no longer the Albert Einstein of our generation)! Einstein
zombie world should forget Einstein's 1905 false light postulate and
pay no attention to what careless Einsteinians write from time to
time:

http://philsci-archive.pitt.edu/arch.../02/Norton.pdf
John Norton: "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......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, Chapter 5.
(I do not have the text in English so I am giving it in French)
Banesh Hoffmann, "La relativite, histoire d'une grande idee", Pour la
Science, Paris, 1999, p. 112:
"De plus, si l'on admet que la lumiere est constituee de particules,
comme Einstein l'avait suggere dans son premier article, 13 semaines
plus tot, le second principe parait absurde: une pierre jetee d'un
train qui roule tres vite fait bien plus de degats que si on la jette
d'un train a l'arret. Or, d'apres Einstein, la vitesse d'une certaine
particule ne serait pas independante du mouvement du corps qui l'emet!
Si nous considerons que la lumiere est composee de particules qui
obeissent aux lois de Newton, ces particules se conformeront a la
relativite newtonienne. Dans ce cas, il n'est pas necessaire de
recourir a la contraction des longueurs, au temps local ou a la
transformation de Lorentz pour expliquer l'echec de l'experience de
Michelson-Morley. Einstein, comme nous l'avons vu, resista cependant a
la tentation d'expliquer ces echecs a l'aide des idees newtoniennes,
simples et familieres. Il introduisit son second postulat, plus ou
moins evident lorsqu'on pensait en termes d'ondes dans l'ether."

Translation from French: "Moreover, if one admits that light consists
of particles, as Einstein had suggested in his first paper, 13 weeks
earlier, the second principle seems absurd: a stone thrown from a fast-
moving train causes much more damage than one thrown from a train at
rest. Now, according to Einstein, the speed of a particle would not be
independent of the state of motion of the emitting body! If we
consider light as composed of particles that obey Newton's laws, those
particles would conform to Newtonian relativity. In this case, it is
not necessary to resort to length contration, local time and Lorentz
transformations in explaining the negative result of the Michelson-
Morley experiment. Einstein however, as we have seen, resisted the
temptation to explain the negative result in terms of Newton's ideas,
simple and familiar. He introduced his second postulate, more or less
evident as one thinks in terms of waves in aether."


http://ustl1.univ-lille1.fr/culture/...40/pgs/4_5.pdf
Jean Eisenstaedt: "Il n'y a alors aucune raison theorique a ce que la
vitesse de la lumiere ne depende pas de la vitesse de sa source ainsi
que de celle de l'observateur terrestre ; plus clairement encore, il
n'y a pas de raison, dans le cadre de la logique des Principia de
Newton, pour que la lumiere se comporte autrement - quant a sa
trajectoire - qu'une particule materielle. Il n'y a pas non plus de
raison pour que la lumiere ne soit pas sensible a la gravitation.
Bref, pourquoi ne pas appliquer a la lumiere toute la theorie
newtonienne ? C'est en fait ce que font plusieurs astronomes,
opticiens, philosophes de la nature a la fin du XVIIIeme siecle. Les
resultats sont etonnants... et aujourd'hui nouveaux."

Translation from French: "Therefore there is no theoretical reason why
the speed of light should not depend on the speed of the source and
the speed of the terrestrial observer as well; even more clearly,
there is no reason, in the framework of the logic of Newton's
Principia, why light should behave, as far as its trajectory is
concerned, differently from a material particle. Neither is there any
reason why light should not be sensible to gravitation. Briefly, why
don't we apply the whole Newtonian theory to light? In fact, that is
what many astronomers, opticians, philosophers of nature did by the
end of 18th century. The results are surprising....and new nowadays."

Pentcho Valev

 




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