Physics

Problem

Photons with energy

5.0\,\text{eV}

strike a photoemissive surface whose work function is

4.3\,\text{eV}

. Using

1\,\text{eV}=1.60\times10^{-19}\,\text{J}

, calculate the maximum kinetic energy of an emitted electron in joules, giving your answer to two significant figures.