Physics

Problem

For a particular metal, the stopping potentials for incident light of frequencies

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

and

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

are found to be

1.0\,\text{V}

and

2.25\,\text{V}

respectively. What is the threshold frequency of this metal? a)

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

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

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

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