A light ray strikes a plane mirror at an angle of 25° with the normal. What is the angle between the reflected ray and the mirror surface?

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25°

50°

65°

90°

answer is C.

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Detailed Solution

Given,

The angle of incidence, i = 25°

According to the laws of reflection, i = r

Hence, angle of reflection, r = 25°

The angle between the reflected ray and the mirror surface is the complement of the angle of reflection with respect to 90°. Since the angle of reflection is 25°, the angle between the reflected ray and the surface is 90° - 25° = 65°.

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