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A plane mirror reflecting a ray of incident light is rotated through an angle $\theta$ 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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The reflected ray rotates through an angle 20
The reflected ray rotates through an angle $2 \theta$ D
The incident ray is fixed
By keeping the incident ray is fixed, if plane mirror rotates through an angle $\theta$ reflected ray rotates through an angle $2 \theta$.
The incident ray is fixed
By keeping the incident ray is fixed, if plane mirror rotates through an angle $\theta$ reflected ray rotates through an angle $2 \theta$.
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