Third overtone of a closed organ pipe is in unison with fourth harmonic of an open organ pipi . Find the ratio of the lengths of

Correct Answer - C
Third overtone of closed organ pipe means seventh harmonic. Given
`(f_(7))_("closed") = (f_(4))_("open")`
`7((nu)/(4I_(C))) = 4 ((nu)/(2I_(0)))`
`l_(C)/(l_(0)) = (7)/(8)`

Third overtone of a closed organ pipe is in unison with fourth harmonic of an open organ pipi . Find the ratio of the lengths of the pipes.

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