Einstein's Equivalence Postulate and Spacelike Waves

. Einstein's theory of special relativity did two things. First, it adopted the Lorentz transformation (LT) which preserves the velocity of light and Maxwell's equations in all systems and, second, it required that all the laws of physics should be examined as to their transformation properties under the LT. Those laws which do not keep their form invariant are to be generalized so as to obey an "equivalence postulate" which requires that all physical laws must be phrased in an identical ma...