Einstein's Theory of Relativity

Relativity is full of paradoxes, but arguably the most paradoxical one is the law of addition of velocities. According to Newtonian physics, if an object moves with velocity in one reference frame, then in a different reference frame moving with velocity with respect to the original, the object should move with velocity . However, this turns out to be incorrect, especially for objects moving at very high speeds. The correct velocity addition formula according to the special theory of relativity is where is the speed of light. In particular, if , we get independently of what is! So, the light has the same speed in every reference frame.

Puzzle