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Diffraction grating
/dɪfɹˈakʃən ɡɹˈeɪtɪŋ/
/dɪfɹˈækʃən ɡɹˈeɪɾɪŋ/Diffraction grating
01
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
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