Conceptual Physics (12th Edition)

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

Chapter 27 - Reading Check Questions (Comprehension): 22

Answer

The sky sometimes appears whitish because the atmosphere may contain particles that are larger than oxygen and nitrogen molecules. Light of lower frequencies is scattered by such particles, and when this combines with the blue light scattered by oxygen and nitrogen, the result is a whitish sky.

Work Step by Step

This is discussed on page 512.
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