Periscopes are optical devices that allow you to look at objects that are not in the straight line of vision. It usually consists of a metal tube with mirrors within it usually tilted 45 degrees as shown below. Thus the object around a corner can be viewed. Used mostly in submarines. It allows sailors submerged under water to see and monitor what is happening above water. See any World War II movie with submarines or Walt Disney’s “Twenty Thousand Leagues Under The Sea” and you can see a periscope in action.
You would use periscopes for spying or looking above a persons head
No, periscopes allow you to observe objects while you are hidden.
There are two main types of periscopes: optical periscopes, which use mirrors to reflect light and provide a view of objects above the surface of the water, and digital periscopes, which use cameras and screens to provide a similar view. Optical periscopes are commonly used in submarines, while digital periscopes are becoming more popular due to advances in technology.
Big ships such as Navy's have periscopes and submarines have it too. If it is high for you to see you will use an periscopes.
It could be said that submarine crews use periscopes, and that is probably the most common use of these devices.
People use periscopes primarily on submarines to see above the water's surface without the vessel being detected. Periscopes are also used in some sports events, like in golf to see over crowds or obstacles. Additionally, periscopes are sometimes used in buildings or construction sites to view areas that are difficult to access.
Control room, submarines
Periscopes look like long tubes that have lens at both ends and have handles that can move it so other people can look through it
Spies use periscopes to discreetly observe or gather information without revealing their presence. Periscopes allow them to see over walls, around corners, or from hidden locations, making it easier to surveil a target without being detected.
Periscopes look like long tubes that have lens at both ends and have handles that can move it so other people can look through it
Nuclear reactors do not typically use periscopes. Periscopes are usually used in submarines to see above water while remaining submerged. Nuclear reactors utilize control rooms with monitoring equipment and cameras to observe and control the reactor's operations.
Periscopes and kaleidoscopes both use multiple mirrors to reflect and create unique visual effects or views. Periscopes are designed for viewing objects from a hidden or elevated position, while kaleidoscopes create intricate patterns by reflecting colorful objects inside.