Etalon (noun) Definition, Meaning & Examples

noun Optics.
  1. an interferometer consisting of two glass plates that reflect approximately half of each ray of light incident upon them and that are separated by a small, fixed distance: used to compare wavelengths and to study atomic spectra.
noun
  1. a device used in spectroscopy to measure wavelengths by interference effects produced by multiple reflections between parallel half-silvered glass or quartz plates
Etalon (noun) Definition, Meaning & Examples

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