A plane mirror is rotated through an angle of

PHYSICS · Subjective · AP · Physics 2: Algebra-based · Geometric Optics · Geometric Optics

Problem

A plane mirror is rotated through an angle of 10∘10^{\circ}. Explain, in one or two sentences, why the reflected light beam changes direction by 20∘20^{\circ} relative to its original path.

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