Abstract

The experimental situation proposed by Fisk consists of a light source in a system S which sends a signal to two observers, one located at a distance x1 from the source and at rest in S, and the other moving away from the source at a speed v, in such a manner that its position coincides with the point x1 when the light signal reaches x1. The moving observer's coordinate system may be designated as S'. Further, it is assumed that there is a half-silvered mirror associated with the moving observer, and that the light signal reaches the mirror so that part of the signal is received by the S' observer and part is received by the stationary S observer; each observer considers the light to reach him when he is at point x1.