When light of frequency \(v_{1}\) is incident on a metal with work function \(W(w h e r e, h>W)\), the photocurrent falls to zerd at a stopping potential of \(\mathrm{V}_{1} .\) If the frequency of light is increased to \(\mathrm{v}_{2}\), the stopping potential changes to \(\mathrm{V}_{2}\). Therefore, the charge of an electron is given by
(A) \(\frac{\mathrm{W}\left(\mathrm{v}_{2}+\mathrm{v}_{1}\right)}{\mathrm{v}_{1} \mathrm{~V}_{2}+\mathrm{v}_{2} \mathrm{~V}_{1}}\)
(B) \(\frac{W\left(v_{2}+v_{1}\right)}{v_{1} v_{1}+v_{2} v_{2}}\)
(C) \(\frac{W\left(v_{2}-v_{1}\right)}{v_{1} v_{2}-v_{2} v_{1}}\)
(D) \(\frac{W\left(v_{2}-v_{1}\right)}{v_{2} V_{2}-v_{1} V_{1}}\)