The diagram given illustrates the waveform of a note produced by vibrations in an air column of length L. If the speed of sound in air is V, derive an expression for the frequency of the notes

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A. V/L
B. 5V/L2
C. 5L/4V
D. 5V/4L

Correct Answer: Option D

Explanation

L = 5λ/4

λ=4L/5

But λ=fλ

f = vλ=v/4L/5

= 5v/4L

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