write a short note on periscope
Answers
Explanation:
A periscope is an instrument for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation from an observer's current position. In its simplest form, it consists of an outer case with mirrors at each end set parallel to each other at a 45° angle.
A periscope is an optical instrument that uses a system of prisms, lenses or mirrors to reflect images through a tube. ... This simple periscope uses only flat mirrors as compared to the periscopes used on submarines, which are usually a complex optical system using both lenses and mirrors.
The periscope is used in the submarines to see what is going on the water surface, It was used for observation purposes in the trenches during World War I, It is used in some gun turrets and it is used in armed vehicles.