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Physics / Physics with MasteringPhysics 4 / Chapter 26 / Problem 102GP

Physics with MasteringPhysics | 4th Edition | ISBN: 9780321541635 | Authors: James S. Walker

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Chapter 26, Problem 102GP

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QUESTION:

Suppose the separation between the two mirrors in Figure 26–43 is increased by moving the top mirror upward.

(a) Will this affect the number of reflections made by the beam of light? If so, how?

(b) What is the total number of reflections made by the beam of light when the separation between the mirrors is \(145 \mathrm{~cm}\)?

Equation Transcription:

$145\ cm$

Text Transcription:

145 cm

Questions & Answers

QUESTION:

Suppose the separation between the two mirrors in Figure 26–43 is increased by moving the top mirror upward.

(a) Will this affect the number of reflections made by the beam of light? If so, how?

(b) What is the total number of reflections made by the beam of light when the separation between the mirrors is \(145 \mathrm{~cm}\)?

Equation Transcription:

$145\ cm$

Text Transcription:

145 cm

ANSWER:

Step 1 of 4

(a)

In the given case the separation between the two mirrors is increased by moving mirror upwards. Here we need to explain whether the number of reflections made by the beam of light will be affected when the mirror is moved upwards.

When the mirror is moved upwards the beam travels larger distance to the right between every successive reflections. Therefore, the number of reflections decreases when the mirror is moved upwards.

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