Question

In a periscope, two plane mirrors are inclined at an angle of …………… with the vertical walls.
(a) 0°
(b) 30°
(c) 45°
(d) 60°

  • Category: Reflection of Light Class 9 ICSE
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Answer

(c) 45°

Reason — In a periscope two parallel plane mirrors each inclined at 45° with the vertical walls are placed facing each other.

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