Relativity, Physics, Math, Einstein, Spacetime.
result from the following discussion. For the origin of K’ we have permanently x’ = 0, and hence according to the first of the equations (5) 𝑥 = (bc/a)t If we call 𝑣 the velocity with which the origin of K’ is moving relative to K, we then have 𝑣 = bc/a . . . (6) The same value 𝑣 can be obtained