1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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? !!!!!!!!!!!!
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook