Question

Keeping the incident ray fixed in direction, if the plane mirror is rotated through an angle of 15°, the reflected ray is rotated through an angle of??? Explain

Answer 1

Answer:

When a plane mirror is rotated through an angle θ , then the reflected ray rotates through an angle 2θ; but the size of the image remain the same.

that is refracted ray is rotated through an angle of 30 degree.

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Answer 2

Answer:

it will turn 15° with respect to the normal and 30° with respect to incident ray.

this is because rotating mirror will cause a relative opposite rotation of the incident ray.