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Monochromator
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{{short description|Optical device which allows selection of a narrow band of wavelengths from a wider spectrum}} {{Use American English|date = March 2019}} [[Image:Light dispersion conceptual waves350px.gif|thumb|200px|Conceptual animation of the dispersion (or breaking down) of light]] [[File:APS - Kohzu monochromator.jpg|thumb|200px|Monochromator in an x-ray [[beamline]] at the [[Advanced Photon Source]], [[Argonne National Laboratory]].]] A '''monochromator''' is an [[optics|optical]] device that transmits a mechanically selectable narrow band of [[wavelength]]s of [[light]] or other [[radiation]] chosen from a wider range of wavelengths available at the input. The name is {{ety|el|mono-|single||chroma|colour|la|-ator|denoting an agent}}.
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