For a certain metal the threshold frequency is

PHYSICS · Subjective · A Level · Physics · Particles and radiation · Particles and radiation

Problem

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

. Monochromatic light of frequency

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

produces a stopping potential of

1.7\,\text{V}

. Calculate the new stopping potential when the incident frequency is changed to

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

. (Take the electronic charge

e=1.6\times10^{-19}\,\text{C}