Conceptual Physics (12th Edition)

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

Chapter 19 - Think and Discuss - Page 373: 92


This shows that the Sun is rotating.

Work Step by Step

The frequency shift is explained by the Doppler effect. One side of the sun is approaching us, while the other side is moving away from us. This shows that the Sun is rotating. Further evidence of rotation is provided by watching the progress of sunspots on the surface of the sun.
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