How do you determine the frequency of a tuning fork using sonometer?

To determine the frequency of a tuning fork using a sonometer, first, set up the sonometer with a wire of known length, mass per unit length, and tension. Strike the tuning fork to produce a sound and then adjust the length of the vibrating wire until it resonates with the tuning fork's frequency, creating a clear sound. Measure the length of the wire that resonates, and use the formula for the fundamental frequency of the wire, ( f = \frac{1}{2L} \sqrt{\frac{T}{\mu}} ), where ( L ) is the resonant length, ( T ) is the tension, and ( \mu ) is the mass per unit length. Calculate the frequency from this formula.