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Chapter 34: Q. 8 (page 990)

A laser beam is incident on the left mirror in FIGURE EX34.8. Its initial direction is parallel to a line that bisects the mirrors. What is the angle 蠒of the reflected laser beam?

Short Answer

Expert verified

Angle of the reflected shaft,蠒=20掳

Step by step solution

01

The Law of reflection

胃i=胃r

02

Derive the values

In FIGURE 34.8, a ray is incident on the left mirror parallel to a line that bisects the mirror.

Observing the geometry of FIGURE below and applying the law of reflection, we'll see that

30掳+蠒+40掳=90掳

蠒=90掳-30掳+40掳

蠒=20掳

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