diffraction grating
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diffraction grating
n.
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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
diffraction grating
n
(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
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
diffrac′tion grat`ing
n.
a reflective surface etched with fine lines that is used to produce optical spectra by diffraction.
[1865–70]
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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 |
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