Periscope consists of plane mirrors falling catching other, fixed to a frame at an angle of
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45 DEGREES TO REFLECT THE LIGHT
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Periscope consists of plane mirrors falling catching other, fixed to a frame at an angle of 45°. They are a instrument for observation which is used when direct line-of-sight observation is denied from an observer's current position.
This periscope are used in submarines during World War I. Military personnel also use periscopes in some guns and in armoured vehicles.
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