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 …

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.

Explore the world by watching and creating live broadcasts.

Curious about what people are broadcasting around the world? The map, accessible when you click on the globe icon, allows you to access live and replay broadcasts from around the world. When you …

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