periscope definition
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Answer: A periscope is an optical instrument that uses a system of prisms, lenses or mirrors to reflect images through a tube. Light from a distant object strikes the top mirror and is then reflected at an angle of 90 degrees down the periscope tube.
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A periscope is an optical instrument that uses mirrors to reflect images through a tube. Light from a distant object strikes the top mirror and is then reflected down the periscope tube.
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