Opposing hypotheses of the reflection of light applied to the Michelson interferometer

The derivation of light paths in the Michelson interferometer is based on the hypothesis that the incident speed and reflected speed of the wavefront of a ray of light are equal in the frame at absolute rest. In this case, the Michelson‐Morley experiment predicts a fringe shift of 0.40. With the hypothesis that the incident speed and reflected speed of the wavefront of a ray of light are equal in the inertial frame of a mirror at the instance of collision, the Michelson‐Morley experiment predicts a fringe shift of 0.40 × 10 −4 , which is in agreement with the experimental result.