With light falling normally on a diffraction grating, the angle of diffraction of second order is e
Channel: Doubtnut
Date: 2020-08-23

With light falling normally on a diffraction grating, the angle of diffraction of second order is equal to `45^(@)` for a wavelength `lambda_(1) = 0.65mum`. Find the angle of diffraction of third order for a wave length `lambda_(2) = 0.50 mu m`.