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Q.

A plane mirror reflecting a ray of incident light is rotated through an angleθ about an axis through the point of incidence in the plane of the mirror perpendicular to the plane of incidence then

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a

the reflected ray does not rotate

b

the reflected ray rotates through an angle  θ

c

the reflected ray rotates through an angle 2θ

d

the incident ray is not fixed

answer is C.

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Detailed Solution

If the plane mirror is rotated ray an angle θ in anti clock wise direction wise direction but source is fixed then the reflected ray is turned by angle in the anti clock wise direction

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