Physics - Modern Physics Question with Solution | TestHub

The surface of a metal is illuminated with a light of wavelength$\mathrm{400 }\mathrm{n}\mathrm{m}$. The maximum kinetic energy of the ejected photoelectrons was found to be$\mathrm{1.68 }\mathrm{e}\mathrm{V}$. The work function of the metal is$\left(\mathrm{h}\mathrm{c}=1240\mathrm{ }\mathrm{e}\mathrm{V }\mathrm{n}\mathrm{m}\right)$