# At what angle should mirrors be arranged in periscope?

## At what angle should mirrors be arranged in periscope?

45° angle
A periscope is a useful example of the law of reflection at work. It’s important that your mirrors are placed at a 45° angle, because light always reflects away from a mirror at the same angle that it hits it. In a periscope, light from an object strikes the top mirror at 45° and bounces off at the same angle.

## How are mirrors placed in periscope?

In simple periscope, two mirrors are placed at an angle 45 degrees. Parallel rays fom distant object fall on first mirror and gets reflected at same angle and they are made to incident second mirror and again parallel rays are reflected to our eyes by which we can see.

What is the minimum number of plane mirrors needed to make a periscope?

two mirrors
A periscope is an instrument which includes two mirrors or reflecting prisms to vary the direction of the light coming from the sight which is being observed.

### Why are mirrors not used in periscopes?

Convex mirrors form an erect but magnified image and therefore cannot be used for naturally viewing purposes. The concave mirrors form real images and hence show inverted images of the object which will confuse the observer at different levels. Note: For a simple periscope, only plane mirrors are used.

### Which mirror is used in periscope?

Only plane mirrors are used for a simple periscope. An expanded view of the object is required for some distance visions, and therefore convex mirrors are helpful. An erect image is produced by a double reversal of the object. Convex mirrors can be used to view objects that are too close to each other.

How are the two plane mirror in a periscope arranged?

A) The plane mirrors in a periscope is parallel with each other which helps to reflect the light rays from the upper end of the periscope to the lower end of the periscope. The plane mirrors in a Periscope incline at 45° angle with the surface of the periscope.

#### Why two mirrors are kept at 450 in a periscope?

In a periscope, two mirrors are placed at an angle of 45 degrees and at the maximum distance. Due to maximum distance between the mirrors, multiple images do not form and light from the object strike the first mirror and its image is formed. Therefore, the mirrors are kept parallel to each other.

#### What is periscope mirror?

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.

Why are prisms better than mirrors?

Assuming the same quality of manufacture, prisms give less light scatter, a good thing. And unlike a mirror, they are also self collimating. But they also create false color in scopes with fast focal ratios. Prisms on the other hand never scatter light and therefore can produce excellent contrast.

## Why are triangular prisms better than mirrors?

The silver lining of the mirrors also diminishes over time and this means that either the mirror needs to be repainted or replaced which is not possible is optical devices, therefore it is better to use prisms and they reflect light better and are maintenance free.

## Where are periscopes used today?

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.

What are the advantages of periscope?

5 Benefits of Using Periscope:

• Creation of Multimedia Projects.
• Facilitating Interpersonal/Professional Relationships.
• Expanding Educational Opportunities.
• Decreasing Reliance on the Media Binary (TV and Video)

### How do you put a mirror in a periscope?

As each mirror is inserted, place a small piece of Scotch tape over the mirror slots on the outside of the viewing tube. Hold the periscope so the mirrors are resting on the wooden supports, then look through it. NOTE: The mirrors will fall out if you turn your periscope upside down. 1.

### What’s the best way to build a periscope?

Hold the periscope so the mirrors are resting on the wooden supports, then look through it. NOTE: The mirrors will fall out if you turn your periscope upside down. 1. Draw a diagram of the path a ray of light follows as it travels from an object, through the periscope, and into your eye.

How does the light reflect in a periscope?

Light always reflects away from a mirror at the same angle that it hits the mirror. In your periscope, light hits the top mirror at a 45-degree angle and reflects away at the same angle, which bounces it down to the bottom mirror.

#### How does a periscope work on a submarine?

At the bottom of the periscope, the light strikes another mirror and is then reflected into the viewer’s eye. This simple periscope uses only flat mirrors as compared to the periscopes used on submarines, which are usually a complex optical system using both lenses and mirrors.