diffraction grating

Noun
  1. 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 (synset 103199222)
    is a type of: optical device - a device for producing or controlling light
    subtypes: echelon - a diffraction grating consisting of a pile of plates of equal thickness arranged stepwise with a constant offset
    same as: grating

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