Periscope Facts for Kids

A periscope has a tubular design.
••• Hemera Technologies/PhotoObjects.net/Getty Images

A periscope is an instrument people use to look at things from a hidden position. The device has a long tube with parallel mirrors situated at both ends at a 45-degree angle. However, some periscopes opt for prisms rather than mirrors, such as those in submarines. The military typically uses periscopes in armored vehicles and gun turrets.

Meaning

The word periscope derives from two Greek words. “Peri” means “around,” and “scopus” means "to look.” Hence, a periscope has the ability to turn around in a circular manner to view objects usually above ground or on the water's surface.

Use in Submarines

Besides reflecting prisms, periscopes on submarines usually have two telescopes. A submarine features heavy-duty, thick waterproof casing that makes it sturdy enough to withstand high water pressure.

Periscope-Like Device Use

Johann Gutenberg offered a periscope to allow pilgrims to see objects over the heads of others at a religious festival in the 1430s.

Magnification Abilities

When you have programmed both telescopes to have two different sizes of magnification at the same time, the magnification difference between the telescopes results in either an overall enlargement or reduction of the images.

Purpose

The main purpose of the development of the periscope in a submarine was to provide a way to see above the surface while still underwater. Most navies around the world use similar instruments, but employ various designs.

The French Influence

Marie Davey, a French inventor, created a submarine periscope that consisted of a two mirrors a both ends that were held at a 45-degree angles and faced opposing directions. However, in 1872, prisms replaced the mirrors, according to the San Francisco Maritime Association.

Hidden Instrument

The periscope uses a long tube to remain inconspicuous while operating a submarine in water. People do not notice the device even though a section of the periscope sits slightly above water.

Proper Term for Periscopes

Sailors use a standard numbering system for referencing periscopes. The periscope closest to the bow, or front of the ship, is the No. 1 periscope, and so on.

Related Articles

How to Make Periscopes With Toilet Paper Rolls
The Differences Between Microscopes and Telescopes
Concave Lens Uses
How Do Holographic Projectors Work?
The Different Kinds of Lens Defects
Advantages & Disadvantages of Convex Mirrors
What Are Optical Telescopes Used for?
What is the Difference Between a Magnifying Glass and...
Uses of Prisms
Difference Between Compound & Dissecting Microscopes
Real Life Parabola Examples
Weather Vane Facts
The Focal Length of Microscope Objectives
How to Use the Bushnell Telescope 78-9512
Types of Spherical Mirrors
How Are Concave Mirrors Used?
The First Camera Invented: How Did It Work?
Different Kinds of Microscopes & Their Uses

Dont Go!

We Have More Great Sciencing Articles!