A woman 1.6 m in height wants a plane mirror so that she can view her full height. The minimum vertical size of such a mirror is
A) 0.4 m.
B) 0.8 m.
C) 1.6 m.
D) 3.2 m.
E) impossible to say without knowing the viewing distance.

Question

Quizplus · Accepted Answer

The minimum vertical size of the mirror required to view her full height is half her height, which is 0.8 m. This is because the angle of incidence equals the angle of reflection, allowing her to see her entire height in a mirror half her size.

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