What is the maximum kinetic energy of the photoelectrons ejected from magnesium

PHYSICS · Subjective · A Level · Physics · Particles and radiation · Particles and radiation

Problem

What is the maximum kinetic energy of the photoelectrons ejected from magnesium, for which the work function is

W=3.7\text{ eV}

, when irradiated by ultraviolet light of frequency

1.5\times10^{15}\text{ s}^{-1}