Question 23M.1.HL.TZ1.14

A standing wave is formed in a pipe open at one end and closed at the other. The length of the pipe is L and the speed of sound in the pipe is V.

n is a positive integer.

What expression is correct about the frequencies of the harmonics in the pipe?

A.  $\frac{(2n-1)V}{2L}$

B.  $\frac{(2n-1)V}{4L}$

C.  $\frac{nV}{2L}$

D.  $\frac{nV}{4L}$