Physics - Modern Physics Question with Solution | TestHub

Ultraviolet light by wavelength$200 \mathrm{nm}$is incident on the polished surface of$\mathrm{Fe}$(Iron). The work function of the surface is$4.71 \mathrm{eV}$. What will be its stopping potential?
$\left(h=6.626\times {10}^{-34} \mathrm{J}\mathrm{ }\mathrm{s}; 1 \mathrm{eV}=1.6\times {10}^{-19} \mathrm{J}; C=3\times {10}^8 \mathrm{m} {\mathrm{s}}^{-1}\right)$