interferometer
Noun
Meaning
any measuring instrument that uses interference patterns to make accurate measurements of waves
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Examples
A beam of infrared light is produced, passed through an interferometer (not shown), and then split into two separate beams.
Acoustic interferometry An acoustic interferometer is an instrument for measuring the physical characteristics of sound wave in a gas or liquid.
A detailed discussion of the interferometer and its use for determining the speed of light can be found in citation A coherent beam of light (e.g. from a laser ), with a known frequency (f), is split to follow two paths and then recombined.
A moving mirror inside the apparatus alters the distribution of infrared light that passes through the interferometer.
A Michelson interferometer, where light from a is split at b, bounces off the mirrors at d and c, us recombined at q and then observed at e.
Extracting the spectrum The intensity as a function of the path length difference (also denoted as retardation) in the interferometer and wavenumber is Peter Atkins, Julio De Paula. 2006.