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Two waves with the same amplitude and wa...

Two waves with the same amplitude and wavelength interface in three different situation to produce resultant waves with the following equations:
(1) y' (x,t) =4 sin (5x-4t)
(2) y' (x,t) =4 sin (5x) cos (4t)
(3) y' (x,t) =4 sin (5x+4t)
In which stituation are the two combing waves traveling (a) toward positive x, (b) toward negative x, and (c) in opposite directions?

Text Solution

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The correct Answer is:
1; (b) 3; (c) 2
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