Ultraviolet light of wavelength is incident on a metal whose work function is

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

Problem

Ultraviolet light of wavelength

300\,\text{nm}

is incident on a metal whose work function is

2.0\,\text{eV}

. What is the maximum kinetic energy of the emitted photoelectrons? (Useful constants:

hc=1240\,\text{eV}\cdot\text{nm}

) (a)

4.1\,\text{eV}

(b)

2.1\,\text{eV}

0.33\,\text{eV}