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Homework Help: Simple Photoelectric Effect Conceptual Question

  1. May 5, 2010 #1
    This is more of a conceptual question.

    1. The problem statement, all variables and given/known data
    1.[tex]KE_{Max} = hf-\phi[/tex]

    2.[tex]\phi[/tex] = Work Function. The minimum energy required to free an electron with a photon

    3.[tex]E=hf[/tex] This it the energy of a photon
    In my book it says that" [tex]hf > \phi[/tex]" then electrons can be ejected" and ""If the light frequency is too low, such that the photon energy [tex]hf[/tex] is less than the work function [tex]\phi[/tex], then there is simply insufficeient energy in any given photon to free an electron.

    What is the kinetic energy of an electron if the energy of a photon is the same as the Work Function? Like what happens?
  2. jcsd
  3. May 6, 2010 #2
    the kinetic energy of an electron is zero
    Like what happens? !!!!!!!!!!!!
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