it bounces the light from the mirrors so that the light is bounced into the persons eye
it is prism
A periscope mirror is referred to as a "prism" or a "reflecting prism." It is the component used within a periscope to reflect light at a 90-degree angle, allowing for the viewing of objects that are not in direct line of sight.
The periscope has several parts: the ocular lenses, the mirror or prism, inversion/reversion prisms, relay lenses, another mirror or prism, and objective lenses.
It depends on the specific requirements of the periscope. A mirror periscope may be more cost-effective and simple to construct, but a prism periscope can offer a wider field of view and better image quality due to reduced light loss. Choose based on the specific needs of the application.
Prism is simply one of those issues that is important, that involves knowledgeable help about
A periscope uses mirrors to allow someone to see over obstacles or around corners. Light enters through one end of the periscope, reflects off the mirrors inside, and then exits through the eyepiece, providing a view of the surrounding area without being directly in the line of sight.
When at periscope depth, they look through the periscope. It is a prism arrangement that allows good vision around the area. It also provided for gauging distances with a built in range finder.
Mirrors have distortion in the images they project while prisms create undistorted images. :D
Periscopes work by reflecting light, not refracting it. Light enters the top of the periscope and is reflected through 90 degrees by either a plane mirror or a right angled prism (TIR) and travels down the tube where it is reflected again along the eyepiece to the eye.
It depends on the periscope type. For traditional periscopes that utilize a prism and raised mast, the entire mast is about 50' long. For newer types that utilize hi-resolution camera arrays (photonics masts) about 30', since they have no need to be housed within the primary hull.
a diagram of a periscope
someone discovered the periscope