1. The problem statement, all variables and given/known data If positron and electron have the same rest energy can pair production occur? 2. Relevant equations E=hc/λ plancks equation E=mc^2 3. The attempt at a solution so i found the E of the photons using plancks equation and found the photon E to be 6.83x10^-14 ( should I double this due to two photons required?) so for pair production the energy of the photons has to be at least the energy of mc^2 so i just added the positron and electrons masses and multiplied by c^2 and got 1.64x10^-13 did i do this correctly? so Ephoton < E of Positron and electron so no pair production can occur? am i missing anything or do something wrong?