Question

When a plane wavefront of monochromatic light is incident normally on a plane
transmission grating with 425 lines per mm, a 2nd order spectral line is observed at an angle of
30°. Find the wavelength of the monochromatic light.​

Answer 1

Explanation:

When a plane wavefront of monochromatic light is incident normally on a plane

transmission grating with 425 lines per mm, a 2nd order spectral line is observed at an angle of

30°. Find the wavelength of the monochromatic light.