Question

A tuning fork produces 4 beats/second from the stretched string of a sonometer of length 0.49 m and 0.50 m. Calculate the frequency of the tuning fork.

Answer 1

Frequency of the sonometer wire ∝ \(\frac { 1 }{ l } \)
Frequency of the tuning fork = n
Then frequency of 0.49 m length of wire = n + 4
and frequency of 0.50 m length of wire = n - 4