Answer
$3.79\times10^{-5}m$.
Work Step by Step
Use equation 36.3 because the angle is small.
$$y_1=\frac{x \lambda}{a}$$
$$a=\frac{x \lambda}{y_1}=\frac{(0.600m) (546\times10^{-9}m)}{8.65\times10^{-3}m}=3.79\times10^{-5}m $$
University Physics with Modern Physics (14th Edition)
by Young, Hugh D.; Freedman, Roger A.
Published by
Pearson
ISBN 10:
0321973615
ISBN 13:
978-0-32197-361-0
Chapter 36 - Diffraction - Problems - Exercises - Page 1211: 36.2
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