Bill Hobba wrote in sci.physics.relativity:
"Pentcho Valev" wrote:
Roberts Roberts a few years ago you discovered that, even if "light in
vacuum does not travel at the invariant speed of the Lorentz
transform", "SR would be unaffected":

Tom did not discover that - it is a simple consequence of the fact light can
be modelled by, for example, the Proca equations, with a very small mass
instead of the usual one, and be in agreement with all current evidence,
provided the mass is taken as small enough.


http://groups.google.com/group/sci.p...c5ec387a7e789?
Tom Roberts: "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)."

I thought initially Jean-Marc Levy-Leblond discovered that, even if
"light in vacuum does not travel at the invariant speed of the Lorentz
transform", "SR would be unaffected":

http://o.castera.free.fr/pdf/onemorederivation.pdf
Jean-Marc Levy-Leblond: "The evidence of the nonzero mass of the
photon would not, as such, shake in any way the validity of the
special relalivity. It would, however, nullify all its derivations
which are based on the invariance of the photon velocity."

Are time dilation and length contraction "derivations which are based
on the invariance of the photon velocity"? More questions could be
asked but neither Tom Roberts nor Jean-Marc Levy-Leblond nor any other
hypnotist in Einstein criminal cult would ever answer. Only bellicose
zombies will continue to defend "special relativity based on the light
postulate", "special relativity without the light postulate" and, if
necessary, "special relativity both with and without the light
postulate".

Pentcho Valev