What is periscope used for?
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.
What is periscope explain?
A periscope is an optical instrument that uses a system of prisms, lenses or mirrors to reflect images through a tube. Light from a distant object strikes the top mirror and is then reflected at an angle of 90 degrees down the periscope tube.
Is Periscope still a thing 2020?
Twitter announced it will shut down the video streaming app Periscope in March 2021. In its announcement on Medium, the Periscope team explained the decision came from declining usage, product realignment, and a desire to eliminate the expense of app maintenance.
How does the periscope work?
A periscope lets you look around walls, corners or other obstacles. In a periscope, light from an object strikes the top mirror at 45° and bounces off at the same angle. This sends light directly down the tube and onto the lower mirror. This mirror, also at a 45° angle, reflects light directly to your eye.
Does periscope show who is watching?
Periscope on Twitter: ” See who’s watching live! Now you can see when people you follow join your broadcast … ”
Is Periscope safe to use?
There are definite safety concerns when it comes to Periscope, including cyberbullying, sexual harassment, and potential access to your child’s location. Since Periscope isn’t monitored, its users are often free to behave however they choose.
What is periscope Class 8?
A periscope is a long, tubular device through which a person can see objects that are out of the direct line of sight. The periscope makes use of two plane mirrors to see over the top of things. Principle. A periscope works on the reflection of light from two plane mirrors arranged parallel to one another.
What are the two uses of Periscope?
Uses Of Periscope It is used in submarines to determine the distance of a torpedo and helps in deciding the right time for the attack. It is used in a nuclear reactor to observe the chemical reactions that are taking place. In military periscopes are used to observe from their hiding position.
How many types of periscope are there?
The 13 Types Of Periscope Chatters – A Survival Guide For Scopers.
What is replacing periscope?
Twitch, YouNow, Vimeo, and Vimeo Livestream are the most popular alternatives and competitors to Periscope.
Why is periscope closing?
Twitter plans to shut down Periscope, the live video streaming app it acquired in 2015, due to declining usage and high costs. The end of its run as a separate mobile app will come in March 2021 when it is removed from app stores, though the ability to create new accounts will stop even sooner.
Which mirror is used in Periscope?
Plane mirrors are used in a reflecting periscope. Two plane mirrors are fixed at the bends of the tube at an angle of 45o with the side of the tube.
Are periscopes still used today?
Periscopes are still used today in tanks and some submarines. In the periscope, light hits the top mirror at 45° and reflects away at the same angle. The light then bounces down to the bottom mirror. When that reflected light hits the second mirror it is reflected again at 45°, right into your eye.