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A source 's' is emitting waves, which travels through a tube of given shape. The detector 'D ' detects constructive interference of certain frequencies. If speed of wave is v and n is an integer then those frequencies are

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A source 's' is emitting waves, which travels through a tube of given shape. The detector 'D ' detects constructive interference of certain frequencies. If speed of wave is v and n is an integer then those frequencies are




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