A diffraction grating is ruled with 600 lines per millimetre. When monochromatic light
Channel: Doubtnut
Date: 2020-01-19

A diffraction grating is ruled with 600 lines per millimetre. When monochromatic light falls normally on the grating, the first order diffracted beams are observed on the far side of the grating each making an angle of `15^@` with the normal to the grating. What is the frequency of the light?