what is a periscope.
Asked by | 26th Aug, 2008, 11:25: PM
It is an optical device used to view objects that are above the level of direct sight or are in an obstructed field of vision.In it’s very simple form , it is made up of two mirrors inclined at 45o to the direction being viewed.
Answered by | 27th Aug, 2008, 01:12: AM
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