Physics

Problem

Monochromatic light of frequency

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

is incident normally on a clean cesium surface whose threshold frequency is

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

. Take

h = 6.63\times10^{-34}\,\text{J\,s}

and

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

. a. (i) Calculate the maximum kinetic energy of the emitted photo-electrons in electron-volt. b. (ii) Determine the stopping potential required to block the most energetic electrons.

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