Periscopes

A periscope is an optical instrument used to see objects that are not in the direct line of sight. It typically consists of a tube with mirrors at each end, at 45-degree angles. Periscopes are commonly used in submarines, armored vehicles, and some buildings to allow people to see around obstacles or over walls.

How Periscopes Work

When light enters the periscope through the top mirror, it is reflected at a 90-degree angle and then again at another 90-degree angle by the bottom mirror, allowing the viewer to see objects that are not in their direct line of sight.

Periscopes in Biology

In biology, the concept of periscopes can be related to the behavior of certain animals that use similar techniques to see their surroundings without being seen. For example, some species of birds and insects have specialized eyes that allow them to see in multiple directions at once, giving them a "periscope-like" view of their environment.

Study Guide

1. What is a periscope and how does it work?
2. What are some common uses of periscopes?
3. How is the concept of periscopes related to biology?
4. Research and list three different types of periscopes used in various applications.
5. Discuss the advantages and disadvantages of using periscopes in different scenarios.