The graph above shows the maximum kinetic energy of emitted

The graph above shows the maximum kinetic energy of emitted photoelectrons as a function of the energy of the photons that are incident on a particular surface. From this graph, determine: the work function of the surface. eV and the threshold frequency. Hz

Solution

Work function = 5 ev

Threshold frequency = 5 * 1.6 * 10^-19 / 6.626*10^-34 = 1.2 * 10^15 Hz