Conceptual Physics (12th Edition)

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

Chapter 19 - Think and Explain: 61

Answer

Violet light has the higher frequency.

Work Step by Step

The wave speed is frequency multiplied by wavelength. $$v = f \lambda $$ Red light's longer wavelength means that its frequency is lower than that of violet light. The product of frequency and wavelength remains the same because the wave speed (i.e., the speed of light) doesn't change.
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