Question

A plane mirror reflecting a ray of incident light is rotated through an angle 10 about an axis through the point

of incidence in the plane of the mirror and perpendicular to the plane of incidence, then the reflected ray
​

Answer 1

Answer:

20°

Explanation:

Angle of deviation of reflected ray is two times the angle of deviation of plane mirror.

Answer 2

Explanation:

Answer: C- The reflected ray rotates through an angle 2θ. A ray of light is reflected by an angle (angle of incidence or angle of reflection; since both are equal) about the normal after reflection. Now, when the mirror itself is rotated by theta, the normal also rotates by theta