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Homework Help: Calculate the wavelength of an electron for a certain energy

  1. Apr 29, 2013 #1
    Got a hmwk question here that asks to calculate λ of an electron with a certain amount of energy, and sadly couldn't figure it out. My solns manual does a fantastic job of regurgitating the formula:
    E = P2 / 2m0

    to be used to get the numerical soln which is technically all I need but I'm an overachieving nerd and I have no idea how they derived this; I tried messing around with the energy-momentum formula but I still can't see it any ideas?

    Thanks a lot!
  2. jcsd
  3. Apr 29, 2013 #2


    User Avatar

    Staff: Mentor

    Hi mitochondriaro. [Broken]

    Sounds like you'd be looking for its De Broglie wavelength. [Broken]
    Last edited by a moderator: May 6, 2017
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