Physics

Problem

Photons of wavelength

300\,\text{nm}

illuminate a photoelectric surface. The emitted electrons are measured to have a maximum kinetic energy of

1.5\,\text{eV}

. What is the threshold frequency of the surface? a)

8.8\times10^{14}\,\text{Hz}

6.4\times10^{14}\,\text{Hz}

1.0\times10^{15}\,\text{Hz}

3.6\times10^{14}\,\text{Hz}