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# Show that when light reflects from two mirrors that meet ISBN: 9781938168000 42

## Solution for problem 2PE Chapter 25

College Physics | 1st Edition

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Problem 2PE

Show that when light reflects from two mirrors that meet each other at a right angle, the outgoing ray is parallel to the incoming ray, as illustrated in the following figure. Step-by-Step Solution:
Step 1 of 3

Solution  2PE

Assume the incident ray reflects at an angle ∅ with the first mirror. Since both mirror meet each other at a right angle, so the first reflection ray forms a right triangle with the two mirrors as shown in below figure: o - ∅

Now from the figure, the angle between the line parallel to the first mirror and outgoing ray is ∅2 and,

∅2  = 90o - Substitute...

Step 2 of 3

Step 3 of 3

##### ISBN: 9781938168000

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