A plane mirror is rotated through 12° while the incident ray remains fixed. Through what angle does the reflected ray rotate?
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A plane mirror is rotated through 12° while the incident ray remains fixed. Through what angle does the reflected ray rotate?

G1 Physics · Accepted Answer

For a fixed incident ray, rotating the mirror normal by θ rotates the reflected ray by 2θ. Thus the reflected ray rotates by 24°.