Find the wavelength of monochromatic light falling normally on a diffraction grating with period
Channel: Doubtnut
Date: 2020-08-16

Find the wavelength of monochromatic light falling normally on a diffraction grating with period `d = 2.2 mu m` if the angle between the directions to the Fraunhofer maxima of the first and the second order is equal to `Delta theta = 15^(@)`.