Principle Of Constant Speed Of Light

- Aug 14, 2019-

Principle of constant speed of light

The speed of light in a vacuum is constant under any reference frame, which can be expressed in geometric language as the world line of photons in space and time is always light-like. It is also because of the experimental nature of photons that the length unit "m" (meter) is defined in the International System of Units using "the distance traveled by light in a vacuum of 1/299, 792, 458 seconds". The principle of constant speed of light is the embodiment of the symmetry of time and space in the universe, and the phenomenon of superluminal speed of neutrinos may only be the symmetry breaking of the symmetry of space and time and cannot overthrow the theory of relativity (the experiment has been confirmed to be wrong).