Mechanics / Electrodynamics
December 31, 2018
The Michelson-Morley experiment  is a well-known experiment for over one hundred years but is still not thoroughly understood. The Michelson interferometer offers an infinite number of light path geometries. The derivation of the light paths presents a high degree of complexity that makes problematic to understand the light interference within the interferometer. This paper presents the particular geometry that is the least complex for studying and understanding the Michelson interferometer in which the beam splitter, the mirror of the transmitted beam of light, and the mirror of the reflected beam of light makes an angle of 45°, 90°, and 0°, respectively, with the direction of the velocity of light from the source. Other particular geometries are, for example [1, 2, 3], when the reflected beam of light travels at aberration angle and the light rays that interfere coincide.