Photons of wavelength illuminate a photoelectric surface

PHYSICS · Single correct · A Level · Physics · Particles and radiation · Particles and radiation

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}

(b)

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

(c)

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

(d)

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