Hello. I'm having some trouble on the last of my homework problems for this week. The problem has to do with destructive interference and is as follows:(adsbygoogle = window.adsbygoogle || []).push({});

Suppose that the separation between speakers A and B is 6.00 m and the speakers are vibrating in phase. They are playing identical 130 Hz tones, and the speed of sound is 343 m/s. What is the largest possible distance between speaker B and the observer at C, such that he observes destructive interference?

http://img378.imageshack.us/img378/6470/1707alt5fr.th.gif [Broken]

It is my understanding that for this problem, L*sqrt(2)-L=(n+lambda)/2 must be the case to get any kind of destructive interference. I think the reason I'm having trouble is that n could be any infinite value, and as n increases, so would length :uhh: ...though I have a feeling this way of thinking is totally backwards.

If anyone has any thoughts, please share. Thanks in advance

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# Homework Help: Destructive Interference Problem

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