Question

What do you
ou mean
by
Periscope ?​

Answer 1

Explanation:

A periscope is defined as an instrument 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 .

Answer 2

A periscope is an instrument for objervation over, around or through an object, obstacles or condition that prevents direct line-of-sight objervation from an objerver'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.