Conceptual Physics (12th Edition)

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

Chapter 26 - Think and Explain - Page 501-502: 63

Answer

Whether a material is transparent or opaque depends on the match between incident light frequencies and the resonant frequency of the atoms in the material.

Work Step by Step

As discussed on pages 491-492, substances are opaque to those frequencies that match their own resonant frequency.
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