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. [1][2]

periscope, optical instrument used in land and sea warfare, submarine navigation, and elsewhere to enable an observer to see his surroundings while remaining under cover, behind armour, or submerged.

Periscope is a social network that allows users to broadcast and consume live-streamed video content. On March 31st, 2021, Periscope was shut down because the cost of maintaining and expanding the …

The meaning of PERISCOPE is a tubular optical instrument containing lenses and mirrors by which an observer obtains an otherwise obstructed field of view.

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A periscope is a simple optical tool that lets you see over walls or around corners. It uses two mirrors or prisms placed at an angle to reflect light from the object to your eyes.

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Apr 5, 2021 · Periscope, a service that played a major role in catapulting mobile live streaming to the forefront, is shutting down for good. In December 2020, Twitter announced its decision to close …

A periscope is a vertical tube which people inside submarines can look through to see above the surface of the water. The submarine was at shallow enough level to have its periscope above water. Collins …

Jun 9, 2025 · A periscope is an optical instrument that enables viewing over, around, or through obstacles when a direct line of sight is not possible. It reflects light using angled mirrors or prisms, …