A. diffraction grating has 800 lines per mm and is illuminated normally by parallel
Channel: Doubtnut
Date: 2020-08-30

A. diffraction grating has 800 lines per mm and is illuminated normally by parallel monochromatic light of wavelengths 560 nm and 590 nm. Calculate the difference in the angular positions of the first order spectra of the two lights on th same suide of the normal.