A light beam incident on a diffraction grating consists of waves with two different wavelengths.The separation of the two first order lines is great if:
A)the dispersion is great
B)the resolution is great
C)the dispersion is small
D)the resolution is small
E)none of the above (line separation does not depend on either dispersion or resolution)

Question

Quizplus · Accepted Answer

The separation of the two first-order lines is greater when the dispersion of the diffraction grating is greater. Dispersion refers to the grating's ability to spatially separate different wavelengths, leading to a larger separation between the lines of different wavelengths.

A Light Beam Incident on a Diffraction Grating Consists of Waves