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The width of a laser beam is significant in reading CDs

Conceptual Physics | 12th Edition | ISBN: 9780321909107 | Authors: Paul G. Hewitt ISBN: 9780321909107 29

Solution for problem 42E Chapter 21

Conceptual Physics | 12th Edition

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Conceptual Physics | 12th Edition | ISBN: 9780321909107 | Authors: Paul G. Hewitt

Conceptual Physics | 12th Edition

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Problem 42E

The width of a laser beam is significant in reading CDs and DVDs. The thinner the beam, the closer the series of pits can be. Why will blue laser light allow closer pits than red laser light?

Step-by-Step Solution:

Solution 42E Step 1 of 2: As the beam waist limited to a diameter of roughly of that wavelength, the size of the laser beam depends on the wavelength of the light. Also as the electromagnetic waves cannot read the structures much smaller than their own wavelength. Blue light(405 nm) has smaller wavelength compared to red light(700 nm). So blue light can form a narrow beam waist.

Step 2 of 2

Chapter 21, Problem 42E is Solved
Textbook: Conceptual Physics
Edition: 12
Author: Paul G. Hewitt
ISBN: 9780321909107

The full step-by-step solution to problem: 42E from chapter: 21 was answered by , our top Physics solution expert on 04/03/17, 08:01AM. This full solution covers the following key subjects: laser, pits, beam, light, closer. This expansive textbook survival guide covers 45 chapters, and 4650 solutions. This textbook survival guide was created for the textbook: Conceptual Physics, edition: 12. Conceptual Physics was written by and is associated to the ISBN: 9780321909107. Since the solution to 42E from 21 chapter was answered, more than 876 students have viewed the full step-by-step answer. The answer to “The width of a laser beam is significant in reading CDs and DVDs. The thinner the beam, the closer the series of pits can be. Why will blue laser light allow closer pits than red laser light?” is broken down into a number of easy to follow steps, and 37 words.

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