Fabry-Perot Interferometer

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A Fabry–Perot interferometer (also called an étalon) is an optical instrument consisting of two highly reflecting parallel mirrors separated by a transparent plate of width . This produces a multiple-beam interference pattern from a beam of light of wavelength with an angle . The light interferes constructively whenever , where .

Contributed by: Enrique Zeleny (February 2012)
Open content licensed under CC BY-NC-SA




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