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Elementary Geometry for College St...

6th Edition
Daniel C. Alexander + 1 other
ISBN: 9781285195698

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Elementary Geometry for College St...

6th Edition
Daniel C. Alexander + 1 other
ISBN: 9781285195698
Textbook Problem
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A periscope uses an indirect method of observation. This instrument allows one to see what would otherwise be obstructed. Mirrors are located (see A B ¯ and C D ¯ in the drawing) so that an image is reflected twice. How are A B ¯ and C D ¯ related to each other?

Chapter 2.2, Problem 21E, A periscope uses an indirect method of observation. This instrument allows one to see what would

To determine

To find:

The relation between AB¯ and CD¯.

Explanation

Given:

Two mirrors AB¯ and CD¯ are located in a periscope as shown in the Figure (1).

Figure (1)

Calculation:

There is 90° angle between incident light and reflected light in Figure (1).

The above statement is true if the angle of incidence of light at mirrors AB¯ and CD¯ is 45°

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