Conceptual Physics (12th Edition)

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

Chapter 26 - Think and Explain: 44

Answer

Radio waves.

Work Step by Step

The wavelengths of radio waves are longer than those of light waves, which in turn are longer than the wavelengths of X-rays. Smaller frequencies correspond to longer wavelengths. This is shown on page 489-490, and in Figure 26.3.
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