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Light shows staged with lasers use moving mirrors to swing

Chapter 25, Problem 3

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QUESTION:

Problem 3PE

Light shows staged with lasers use moving mirrors to swing beams and create colorful effects. Show that a light ray reflected from a mirror changes direction by 2θ when the mirror is rotated by an angle θ .

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QUESTION:

Problem 3PE

Light shows staged with lasers use moving mirrors to swing beams and create colorful effects. Show that a light ray reflected from a mirror changes direction by 2θ when the mirror is rotated by an angle θ .

ANSWER:

Solution 3PE

In above figure the mirror LM rotated by angle.

Since angle of incidence equals to angle of reflection,

So,

⎳IOP = ⎳POR

            = 1

By propert

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