Consider the situation where two speakers facing the same direction are two metres apart. The speakers are in phase, that is, they are producing exactly the same frequency and their movements are exactly synchronised with each other. The two speakers are separate sources of sound waves that diffract at the speaker aperture and then constructively and destructively interfere with each other. What name is given to the points where constructive interference occurs?
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Consider the situation where two speakers facing the same direction are two metres apart. The speake...
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