Conceptual Physics (12th Edition)

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

Chapter 20 - Think and Explain: 50

Answer

The electromagnetic wave has a much longer wavelength.

Work Step by Step

Wave speed is frequency multiplied by wavelength. Electromagnetic waves travel almost a million times faster than sound waves in air. Therefore, a speedy EM wave that has the same frequency as a sound wave will have a wavelength almost a million times longer.
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