Can 1 photon become 2 pairs? (Edited 17 Aug 2004) Hi, what happens if the energy of a photon is more than that of an e- and an e+, can it create two pairs instead or will the 1st pair simply have more kinetic energy? Or are other types of particles involved? Added August 17 2004 : Yeah, yeah I won't forget now, you need 2 photons to make an e+ e- pair because of C. of Momentum. A stupid drawing in an otherwise good book shows one only becoming a pair and has remained in my head like the Smurf's theme song. I thus translate the question to : Can 2 photons become 2 pairs? Or more generally : Is <number of photons> / <number of pairs> necessarily 1? Or even more generally, what happens if the energy of a single photon is much more than (1/2)mc2, where m is the mass of an electron?