Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 24 - The Wave Nature of Light - Problems - Page 709: 44

Answer

630 nm

Work Step by Step

From Example 24–11, the thickness is related to the most strongly-reflected wavelength by $t=\frac{\lambda}{4n}$. $$\lambda=4nt=4(1.32)(120nm)=634nm\approx630nm$$
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