Question

Problem 7.5
A parallel beam of monochromatic light of wavelength 500 nm is incident normally on a plane
diffraction grating having 4000 lines per centimetre. Calculate the angle of diffraction for first
order principal maximum
Solution :​

Answer 1

Answer:

use this formula I think you can find your answer

Explanation:

Question :

A parallel beam of monochromatic light of wavelength 500 nm is incident normally on a plane transmission grating having 6000 lines per cm Find the highest order of the grating spectrum.

Answer :

For the highest order θ = 90° andThus the highest order is m = 3.