Since there are 4 beats. We know that the unknown frequency \((f)\).
\(f=254+4\)
Since in the second case after loading with wax frequency of \(2^{\text {nd }}\) fork must have reduced. Initial frequency must be
\(f=254+4=258 \,Hz\)
$y_{1}=5 \sin 2 \pi(x-v t) \,c m\,$
$y_{2}=3 \sin 2 \pi(x-v t+1.5) \,c m$
આ તરંગો એકી સાથે દોરીમાંથી પસાર થાય છે. પરિણામી તરંગનો કંપવિસ્તાર.........છે
$(a)$ $\left(x^2-v t\right)^2$
$(b)$ $\log \left[\frac{(x+v t)}{x_0}\right]$
$(c)$ $e^{\left\{-\frac{(x+v t)}{x_0}\right\}^2}$
$(d)$ $\frac{1}{x+v t}$