Describe the functioning of the periscope. Also, tell that how many mirrors are there in a periscope.
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periscope is an optical device which work on the principle of reflection.it has two mirror placed parallel to each other.
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A periscope is an instrument for observation over, around or through a objects, obstacles or condition that prevents direct line of sight observations from an observer's current position.
In itssimple form it consists of an outer case with mirror at each end set parallel to each other.
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