Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 30 - Reading Check Questions (Comprehension) - Page 577-578: 25


Coherent light contains monochromatic photons (of a single frequency) that are in phase with each other. Sunlight consists of a broad spectrum of photons that are emitted with random phase differences between them.

Work Step by Step

This is discussed on page 575, and shown in Figure 30.21.
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