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What a periscope is 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 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 periscopes for kids?
A periscope is a simple device that enables children to see over walls or round corners. Rays of light hitting the mirror of the periscope are reflected twice.
What is periscope and examples?
The definition of a periscope is a set of lenses, mirrors or prisms on a tube allowing the viewer to see objected reflected on the other end. An example of a periscope is the viewing tool used on a submarine.
Do modern submarines have periscopes?
Modern submarines are no longer built with the single rotating, one-person-at-a-time periscope that we’re used to seeing in the movies. Instead, periscopes aboard the U.S. Navy’s Virginia-class subs consist of two 360-degree rotating photonics masts with high-resolution cameras.
How far can you see with a periscope?
At sea this is around 11 to 12 miles. If a target is near the horizon then you may be able to see masts or superstructure through the periscope. Modern submarines do not use traditional optical periscopes but optronic masts that employ a range of sensors including a camera and infra red sensor.
What is periscope Class 9?
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.
What are periscopes made of?
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.
What is a periscope Grade 6?
How tall is a periscope on a submarine?
60 feet
A traditional periscope is up to 60 feet long, so that the hull can remain hidden underwater while the periscope lifts up hydraulically to poke up out of the waves.