question_answer

A photosensitive metallic surface has work function\[2\,h{{\nu }_{0}}\]. If photons of \[2\,h{{\nu }_{0}}\] fall on the surface, the electrons come out with a maximum velocity of\[4\times 1{{0}^{6}}m/s\]. If photon energy is increased to \[5\,h{{\nu }_{0}}\], what will be the maximum velocity of photoelectrons in m/s?

Answer:

\[(8\times {{10}^{6}})\]