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Homework Help: Step up and Step down Potentials

  1. Apr 28, 2012 #1
    1. The problem statement, all variables and given/known data

    What fraction of a beam of 8 eV electrons is reflected by a potential step up of height 6 eV? What fraction is reflected from a step down of 6eV?

    2. Relevant equations


    Exchange [itex]k_{1}[/itex] and [itex]k_{2}[/itex] for the step down potential.



    3. The attempt at a solution

    I got 1/9 for the step up.

    But I got the same for the step down potential, which I don't think is right. Am I doing anything wrong for the step down potential? Or should you get the same answer for the step down as for the step up?
    Last edited: Apr 28, 2012
  2. jcsd
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