Physics - Modern Physics Question with Solution | TestHub

Photons of energy $10\mathrm{eV}$ are incident on a photosensitive surface of threshold frequency $2\times 10^{15}\mathrm{Hz}$. The kinetic energy in $\mathrm{eV}$ of the photoelectrons emitted is [Planck's constant $\mathrm{h}=6.63\times 10^{34}$ $\mathrm{Js}]$