Question

. A diffraction grating has 2000 lines per centimetre. At what angle will the first-order
maximum be for 520-nm-wavelength green light?

Answer 1

Explanation:

Step 1 of 4

For the diffraction grating, the necessary condition to obtain constructive interference is,

Here d is the distance between slits, ? is the wavelength of light, m is the order of the maximum and ? is the angle from the original direction of the beam.