Physics

Problem

Which one of the following expressions gives the frequency

f_n

of the

n^{\text{th}}

harmonic of a stretched string of length

L

on which waves travel with speed

v

? a)

f_n = \dfrac{v}{nL}

f_n = \dfrac{n v}{L}

f_n = \dfrac{n v}{2L}

f_n = \dfrac{(2n-1) v}{4L}