On the invariance of the speed of light

TL;DR

This paper demonstrates that the invariance of the speed of light naturally follows from the relativity principle and homogeneity of space and time, simplifying the logical foundation of special relativity.

Contribution

It presents a new approach showing the invariance of light speed as a consequence of existing principles, reducing the postulates needed for special relativity.

Findings

Speed of light invariance follows from relativity principle and homogeneity.

Simplifies the logical basis of special relativity.

Uses only one postulate for derivation.

Abstract

The invariance of the speed of light in all inertial frames - the second postulate of special theory of relativity (STR) - is shown to be an inevitable consequence of the relativity principle of special theory of relativity taken in conjunction with the homogeneity of space and time in all inertial frames, i.e., the 1st postulate of STR. The new approach presented here renders the learning of special theory of relativity logically simpler, as it makes use of only one postulate.