Answer
(a)
Work Step by Step
Wavefront B does not in any way interfere with $S2$, which reduces its ability to have a intensity point of $0$. This can be applied to all of them save Wavefront A which has a intensity point of $0$.
College Physics (4th Edition)
by Giambattista, Alan; Richardson, Betty; Richardson, Robert
Published by
McGraw-Hill Education
ISBN 10:
0073512141
ISBN 13:
978-0-07351-214-3
Chapter 25 - Multiple-Choice Questions - Page 974: 1
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