MHT CET 2026 Physics question

In the phenomenon of refraction of light for the same angle of incidence

(A)angle of refraction is same for different colours
(B)angle of refraction is different for different colours.Correct
(C)angle of refraction does not depend upon the colour of the light used.
(D)angle of refraction depends on critical angle.

Answer: (B)

Solution

By Snell's law, , so for a fixed angle of incidence the angle of refraction depends on the refractive index of the medium. The refractive index depends on wavelength (Cauchy's relation, ): it is larger for violet and smaller for red.

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Question ID VK-098422