An optical device composed of a large number of parallel slits of equal width and spacing is called grating. The commonly used grating is made by engraving a large number of parallel notches on the glass sheet.
May 12, 2022
An optical device composed of a large number of parallel slits of equal width and spacing is called grating. The commonly used grating is made by engraving a large number of parallel notches on the glass sheet.
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