Answer
$P = 65.8~mW$
Work Step by Step
Note that: $~~P \propto I$
We can use Malus' Law:
$I = I_0~cos^2~\theta$
$P = P_0~cos^2~\theta$
$P = (200~mW)~(cos^2~55^{\circ})$
$P = 65.8~mW$
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)
by Knight, Randall D.
Published by
Pearson
ISBN 10:
0321740904
ISBN 13:
978-0-32174-090-8
Chapter 34 - Electromagnetic Fields and Waves - Exercises and Problems - Page 1030: 26
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