The shortening of bodies in the direction of motion, Lorentz contraction,follows from the solution of Maxwell's equations. Moving light clocks will tickslower than those at rest because the speed of light does not depend on asource of the light. The latter and Lorentz contraction imply the relativistictime dilation. The invariance of the light speed defined as the round-tripvalue follows from the time dilation and Lorentz contraction. An observer isincognizant about his motion relative to the absolute frame of reference. So,in order to synchronize spaced clocks in a moving reference frame he uses thesame procedure as in the absolute frame. We deduce the Lorentz transformationfrom the Lorentz contraction, time dilation, invariance of the light speed andsynchronization procedure. Lorentz transformations constitute a symmetry groupof Maxwell's equations. That is the reason why the absolute frame can not bedistinguished among other inertial reference frames.
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