Physics

Problem

Monochromatic light of frequency

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

produces a stopping potential of

1.6\,\text{V}

on a certain metal (threshold frequency

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

). The frequency of the light is first increased by

40\%

and then decreased by

10\%

of its new value. What is the final stopping potential produced on the same metal? a)

3.20\,\text{V}

2.64\,\text{V}

3.52\,\text{V}

2.02\,\text{V}