The stopping potential V_o (in volt) as a function of frequency (ν) for a sodium emitter, is shown in the figure. The work function of sodium, from…

The stopping potential $\displaystyle \mathrm{V}_{\mathrm{o}}$ (in volt) as a function of frequency $\displaystyle (\nu)$ for a sodium emitter, is shown in the figure. The work function of sodium, from the data plotted in the figure, will be : (Given : Planck's constant (h) $\displaystyle =6.63 \times 10^{-34} \mathrm{Js}$, electron charge $\displaystyle \mathrm{e}=1.6 \times 10^{-19} \mathrm{C}$ )