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Homework Help: Photoelectric effect wavelength

  1. Oct 10, 2009 #1
    This is not a specific question; I'm just unclear about a concept.

    1. The problem statement, all variables and given/known data

    Given the kinetic energy of an electron emitted, how would you find the wavelength?

    2. Relevant equations




    3. The attempt at a solution

    I'm thinking I would use the secon equation, find v, then use de Broglie's relationship to find wavelength. Am I on the right track?
  2. jcsd
  3. Oct 10, 2009 #2

    Doc Al

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    Staff: Mentor

    Assuming that the question is to find the de Broglie wavelength of the electron, then you are on the right track.
  4. Oct 10, 2009 #3
    The question hadn't specified de broglie wavelength- hence my confusion as to whether I would use de Broglie's relationship or just planck's equation.
    I thought planck's equation only pertained to EM radiation?
  5. Oct 10, 2009 #4

    Doc Al

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    Staff: Mentor

    Post the question word for word as it was given to you.
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