Abstract:Einstein based his special theory of relativity on two postulates: (a) physical laws appear the same in all inertial frames, and (b) the speed of light in vacuum is an observerindependent constant. However, it is already known that the principle of the constancy of the speed of light is redundant in the construction of the special theory of relativity.Adhering to this idea, we show here that the form of the Lagrangian for a free relativistic particle can be derived if we consider a class of theories that remai… Show more
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