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A polished surface, usually glass or metal, having a large number of very fine parallel grooves or slits, and used to produce optical spectra by diffraction of reflected or transmitted light.
(General Physics) a glass plate or a mirror with a large number of equidistant parallel lines or grooves on its surface. It causes diffraction of transmitted or reflected light, ultraviolet radiation, or X-rays
a reflective surface etched with fine lines that is used to produce optical spectra by diffraction.
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|Noun||1.||diffraction grating - optical device consisting of a surface with many parallel grooves in it; disperses a beam of light (or other electromagnetic radiation) into its wavelengths to produce its spectrum|
echelon - a diffraction grating consisting of a pile of plates of equal thickness arranged stepwise with a constant offset
optical device - a device for producing or controlling light