Physics

Problem

A metal surface has work function

4.5\,\text{eV}

. Determine the minimum frequency of radiation required so that the emitted electrons have a stopping potential of

1.5\,\text{V}

. a)

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

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

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

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