diffraction grating Hear it!

diffraction grating definition

diffraction grating

Optics a plate of glass or polished metal ruled with a series of very close, equidistant, parallel lines, used to produce a spectrum by the diffraction of reflected or transmitted light

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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