Q.5. Two plane mirrors AB and CD are placed at right angles to one another. A ray of light PQ hits AB at Q making an angle of 45° as shown in diagram. This ray will be reflected from mirror BD at an angle

A) 20°
B) 35°
C) 45°
D) 60°

according to 1st law of reflection , angle Q is 45 degree.
if we go with angle sum property of triangles , the ray reflected from mirror BD will be 45 degree.
so, the answer is 45 degree.

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