# Non-Einstenian Special Relativity.

1. Jan 22, 2007

### Kevin_spencer2

Is there another version of SR without obeying Einsteinian postulates?, which are:

1. Speed of Light is the same for all the observers (note: in the fictional?? "Ummo Mistery" about alien contact they talked about a different configuration of space-time in 10-dimension so you could choose set of system with different light speed "c" )

2. Space is isotrope, and Lorentz transforms could be considered as some kind of rotations' in 4-Euclidean space $$g_{ab}=(1,1,1,1)$$

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¿ Could Einstein be wrong and speed of light is changing??. note that in FRW metric the 'Radius of Universe' is variable $$R=R(t)$$ however common sense or classical Newtonian mechanics predicts a never-changing universe, so it wouldn't be so rare that speed of light changed in time c=c(t) , and isotropy of space is 'supposed' from empirical facts, but at Quantum scale is nothing known, so could Einstein be wrong??, remember the group-contraction so whenever [tex] \hbar \rightarrow 0 [tex] things are very different, a possible key would be quantum Electrodynamic and how the Maxwell laws are modified.

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