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How A Periscope Works and How It Works.

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by

Nicholas Bouvier

on 18 June 2014

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Transcript of How A Periscope Works and How It Works.

What Is A Periscope?
A periscope is an instrument for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation from an observer's current position.
How it works
A periscope works by using two mirrors to bounce light from one place to another. A typical periscope uses two mirrors at 45 degree angles to the direction one desires to see. The light bounces from one to the other and then out to the persons eye.
Different complex periscopes
More complex periscopes, using prisms and/or advanced fiber optics instead of mirrors, and providing magnification, operate on submarines and in various fields of science. The overall design of the classical submarine periscope is very simple: two telescopes pointed into each other. If the two telescopes have different individual magnification, the difference between them causes an overall magnification or reduction.
History Of The Periscope
The periscope was invented in 1450 by a person called Johann Gutenburg. The periscope was initially invented to help people could see over people's heads in crowds or up and around the corner in trenches. It is an optical device that has been adapted for conducting observations from a concealed or protected position.
How Does A Periscope Work?
By: Nicholas & Jarod.
Physics Of A Periscope
The Law of Reflection
Objects can be seen by the light they emit, or, more often, by the light they reflect. Reflected light obeys the law of reflection, that the angle of reflection equals the angle of incidence.
Questions that we had asked ourselves
1)Where else do periscopes be used besides in a submarine?
2)How does the periscope work and why does the reflection go so far? Unfortunately, we only answered 1) and they are sometimes used to see above crowds.
Materials
The materials that we have used to construct our periscope are:
Cardboard
Duct tape
Two mirrors
Scissors
A knife
How we created the periscope
We had only constructed one periscope out of the materials listed in the last slide. We made the periscope out of our basic knowledge of it.
Is simply the reflection of light. A periscope is based on the two laws of reflection of light.
1) When a ray is incident on a plane and it gets reflected, the reflected ray, the incident ray and the normal to the surface all lie in the same plane.

2) The angle of reflection is equal to the angle of incidence. i.e. the angle which the reflected ray makes with the normal is equal to the angle which the incident ray makes with the normal.
Problems We Faced
The problem we had faced were finding the two mirrors that fit inside our periscope. We had somewhat solved this but the mirror was a little too small, so we reinforced it with tape.
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