Definition of diffraction grating in English English dictionary
a surface having a large number of closely spaced lines or slits; used to produce optical spectra by mutual interference
A plate of glass or metal ruled with very close parallel lines, producing a spectrum by diffraction and interference of light
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
A usually glass or polished metal surface having a large number of very fine parallel grooves or slits and used to produce optical spectra by diffraction of reflected or transmitted light