Physics

Problem

For a certain metal, the stopping potential is

1.5\,\text{V}

when irradiated with light of frequency

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

. What frequency of light would produce a stopping potential of

3.0\,\text{V}

for the same metal? (Use

h/e = 4.14\times10^{-15}\,\text{eV s}