Conceptual Physics (12th Edition)

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

Chapter 27 - Think and Explain: 39

Answer

Tennis balls are now colored yellow-green.

Work Step by Step

The eye is most sensitive to the yellow-green part of the visible spectrum, so making tennis balls this color makes them more visible. It also helps the ball to stand out against the background. Spectators may be wearing white clothing, which would momentarily camouflage a white ball as it passed in front of them.
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