University Physics with Modern Physics (14th Edition)

Published by Pearson
ISBN 10: 0321973615
ISBN 13: 978-0-32197-361-0

Chapter 36 - Diffraction - Problems - Exercises - Page 1213: 36.36


0.559 nm.

Work Step by Step

The maxima occur at angles $\theta$ given by $2d sin \theta=m \lambda$, where d is the spacing between adjacent atomic planes, 0.440 nm. “First order” means that m = 1. $$\lambda =\frac{2 d sin \theta }{1 }=\frac{ 2(0.440\times10^{-9}m) sin 39.4^{\circ}}{1 }=5.59\times10^{-10}m$$
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