Sound WavesHard

Question

Two open pipes of length L are vibrated simultaneously. If length of one of the pipes is reduced by y, then the number of beats heard per second will be if the velocity of sound is v and y < < L : -

Options

A.
B.
C.
D.

Solution

λ1 = 2L ; λ2 = 2 (L - y)
ᐃf = f2 - f1 =
⇒

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