Conceptual Physics (12th Edition)

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

Chapter 28 - Think and Explain: 67

Answer

Agree.

Work Step by Step

Figure 28.25 correctly shows that in water, the wavefronts are closer together than they are in air. The speed of the wave is (frequency)(wavelength). The wave slowed down in water, and the frequency stayed the same, so the wavelength must have decreased.
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