Periscope is made using ______ mirror.

concave

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diverging

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plane

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convex

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Solution

The correct option is C plane
A periscope is an instrument made up of plane mirrors which is used for observing over, around or through an obstacle or object which is prevented by direct line of sight. It consists of an outer case with mirrors at each end at 45° angle. These mirrors are placed parallel to the surface.

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