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Contact potential difference

  1. May 13, 2016 #1
    1. The problem statement, all variables and given/known data
    I'm writing my lab report on the Franck-Hertz experiment and I have trouble with the contact potential difference (inelastic collision). How do you calculate it?

    2. Relevant equations
    See below

    3. The attempt at a solution
    The energy differences between the maximum and minimum peaks lies around 4.9 eV (4.9 +/- 0.5 eV approx.) , which is the "correct" value. When it comes to the contact potential difference, I guess that I can calculate it by calculating the average between two peaks and then subtract it from the first peak? But I'm not sure.
  2. jcsd
  3. May 18, 2016 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
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