Question

what is the special theory of relativity

Answer 1

In physics, special relativity  is the generally accepted and experimentally well-confirmed physical theory regarding the relationship between space and time. In Albert Einstein's original pedagogical treatment, it is based on two postulates:

The laws of physics are invariant in all inertial systems .The speed of light in a vacuum is the same for all observers, regardless of the motion of the light source.

Answer 2

theory of relativity given by very special scientist Einstein, thus theory tells about light speed, special thing is, Einstein say that if we go in the speed of light time around us become slow.