An electron and a positron are moving toward each other and each has speed 0.560c in the lab frame.
1. What is the wavelength of each photon? ____________ m
2. What is the kinetic energy of each particle? Ke-:________ J, Ke+__________ J
3. The e+ and e- meet head-on and annihilate. What is the energy of each photon that is produced? Eph: __________ J