Problem 3

Monochromatic light of frequency

f=8.0\times10^{14}\,\mathrm{Hz}

illuminates a metal with work function

\phi=2.0\,\mathrm{eV}

. Use

h=4.14\times10^{-15}\,\mathrm{eV\,s}

and elementary charge

e

; neglect energy losses after emission. (a) Check whether electrons are emitted. (b) Find their maximum kinetic energy. (c) Determine the stopping-voltage magnitude. (a) Find the first requested quantity. (b) Find the second quantity. (c) Determine the final result and check its units. (a) Check the emission th (a) Check the emission threshold. (b) Find the maximum electron kinetic energy. (c) Find the stopping voltage and the metal’s threshold frequency.

problems.proof.stepOf

problems.proof.prevStep problems.proof.nextStep

\\boxed{K_{max}=1.31\\,\\mathrm{eV},\\quad |V_s|=1.31\\,\\mathrm V,\\quad f_0=4.83\\times10^{14}\\,\\mathrm{Hz}}

problems.proof.analysis

Collect the results for all parts in one place. This makes clear that they use the same data and a consistent sign convention.