Relativity, Physics, Math, Einstein, Spacetime.
to the previous observations. — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — But from what has been said, the two snapshots must be identical; hence Δx in (7) must be equal to Δx’ in (7a), so that we obtain a² = 1/ (1 — v²/c²). . . . (7b) The equations (6) and (7b)