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Question

How many mirrors are used in a periscope?

A
1
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B
2
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C
3
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D
4
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Solution

The correct option is B 2
A periscope is defined as an instrument used for observing over, around, or through an obstacle or object which is prevented by a direct line of sight. Periscopes are fitted with two plane mirrors at the ends of the tube at an angle of 450 with the side of the tube.
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