Physics

Problem

A metal has threshold frequency

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

. When illuminated with light of frequency

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

, the required stopping potential is

1.2\,\text{V}

. Calculate the stopping potential when the same surface is exposed to light of frequency

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