Chemistry - Atomic Structure Question with Solution | TestHub

A light source emits radiation of $\lambda =310\mathrm{nm}$. Number of photons emitted by this source varies with time, as $N=10^{18}{t}^2$. (t insec). If the light source is used to emit photoelectrons from a metal of work function. 3.1 eV . Find the time during which the total maximum possible kinetic energy of all the emitted photoelectrons from the beginning is 1296J. $($ Use $E(\mathrm{eV})=\frac{12400}{\lambda \left(A^0\right)})$