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 arms.

What do u mean by interferometer?

: an apparatus that utilizes the interference of waves (as of light) for precise determinations (as of distance or wavelength)

What is an interferometer and an example?

A double path interferometer is one in which the reference beam and sample beam travel along divergent paths. Examples include the Michelson interferometer, the Twyman–Green interferometer, and the Mach–Zehnder interferometer.