Conceptual Physics (12th Edition)

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

Chapter 19 - Think and Explain - Page 371-372: 54

Answer

The frequency doubles.

Work Step by Step

The wave speed v is frequency multiplied by wavelength. $$v = f \lambda $$ If wave speed doubles while wavelength stays the same, the frequency must also double.
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