(adsbygoogle = window.adsbygoogle || []).push({}); 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.

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

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