A metal surface has work function

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

Problem

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}

(b)

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

(c)

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

(d)

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