Physics

Problem

Monochromatic radiation of frequency

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

is incident on an aluminum surface whose work function is

4.08\,\text{eV}

. Assuming non-relativistic motion, what is the maximum speed of the emitted electrons? Constants:

h=6.63\times10^{-34}\,\text{J}\cdot\text{s}

m_e=9.11\times10^{-31}\,\text{kg}

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

. a)

1.3\times10^{6}\,\text{m/s}

5.6\times10^{5}\,\text{m/s}

0\,\text{m/s}

4.0\times10^{5}\,\text{m/s}