Conceptual Physics (12th Edition)

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

Chapter 26 - Think and Discuss - Page 502-503: 81


Yes, it supports the idea.

Work Step by Step

If electromagnetic wave speed depended even slightly on frequency, then after such a long trip from the supernova, different frequencies of electromagnetic radiation would be received at different times. Instead, we observe that the different frequencies are received simultaneously. This is evidence for the frequency independence of the speed of electromagnetic radiation.
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