Question

The cause of dispersion of light is (A) All the colors of light travel with the speed more than the speed of light. (B) All the colors have different angles of deviation. (C) All the colors do not travel with the same speed of light. (D) All the colors have the same wavelength​

Answer 1

Answer:

(C) All the colours do not travel with the same speed of light.

Answer 2

The cause of dispersion of light is (b) All the colors have different angles of deviation.

Explanation:

Option : (b) All the colors have different angles of deviation.

Dispersion of light is caused by the change of speed of light ray (resulting in angle of deviation) of each wavelength by a different amount. The different indices of refraction for the different wavelengths of visible light, the angle of deviation varies with wavelength.