A plane light wave with wavelength `lambda` falls normally on a phase diffraction grating whose side
Channel: Doubtnut
Date: 2020-08-30

A plane light wave with wavelength `lambda` falls normally on a phase diffraction grating whose side view is shown in Fig. The grating is cut on a glass plate with refractive index `n`. Find the depth `h` of the lines at which the intensity of the central Fraunhofer maximum is equal to zero. what is in this case the diffraction angle corresponding to the first maximum? img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/IROD_V01_C05_E01_131_Q01.png" width="80%"