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Homework Help: Energy and Wavelength of a photon in pair production

  1. Aug 8, 2010 #1
    1. The problem statement, all variables and given/known data

    Electron and positron each have a kinetic energy of 220 keV even when far apart.

    2. Relevant equations

    3. The attempt at a solution
    I have no idea. My book says the answer 1.46 MeV, 8.49 x 10^-13 m but I don't know how to get that.
    Last edited: Aug 8, 2010
  2. jcsd
  3. Aug 8, 2010 #2
    Position is antiparticle of electron. So what will happen when they collide?
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