Question

An incident ray makes an angle of 65° with the surface of a plane mirror. The angle of reflection in this case will be:
A. 65°
B. 45°
C. 25°
D. 35°

Answer 1

Answer:

(A)65°

Explanation:

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Answer 2

The angle of reflection in this case will be C. 25°

Explanation:

According to law of reflection, the angle of incidence is always equal to angle of reflection.

From question, the angle incident ray makes with plane mirror is given not the angle of incidence. So, incidence angle is given by the formula:

Angle of incidence = 90 - Angle ray makes with the plane mirror

Angle of incidence = 90 - 65°

Angle of incidence = 25°

Since, the angle of incidence is 25° then the angle of reflection is also 25°.