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Water waves having parallel crests 4.5 cm apart pass through two openings 7.5 cm apart in a board. At a point 3.0 m beyond the board, at what angle relative to the “straight-through” direction would there be little or no wave action?

Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014. Reprinted by permission of Pearson Education Inc., New York.
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Quick Answer: 

$\theta_o = 17^\circ$
$\theta_1 = 64^\circ$
$\theta_2 = \textrm{ undefined}$

Giancoli 7th Edition, Chapter 24, Problem 5


Chapter 24, Problem 5 is solved.

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