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This image demonstrates a simple but typical Michelson interferometer. The bright yellow line indicates the path of light. The Michelson interferometer is a common configuration for optical interferometry and was invented by the 19/20th-century American physicist Albert Abraham Michelson. Using a beam splitter, a light source is split into two ...
English: Formation of fringes in a Michelson interferometer. (a) If mirror M 1 and the reflected image M' 2 are parallel but separated by a finite distance, the two reflected sources S' 1 and S' 2 will be centered on the normal to the mirrors, and the interference fringes will be circles.
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Michelson and Morley created an improved version of the Michelson experiment with more than enough accuracy to detect this hypothetical effect. The experiment was performed in several periods of concentrated observations between April and July 1887, in the basement of Adelbert Dormitory of WRU (later renamed Pierce Hall, demolished in 1962).
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Schematic diagram of a Michelson interferometer, configured for FTIR. In a Michelson interferometer adapted for FTIR, light from the polychromatic infrared source, approximately a black-body radiator, is collimated and directed to a beam splitter. Ideally 50% of the light is refracted towards the fixed mirror and 50% is transmitted towards the ...