Recent content by rak576

Sorry, I didn't put that in. Qp + Qe = Pa + Pb

Homework Statement A positron of rest mass me, kinetic energy equal to its rest mass-energy, strikes an electron at rest. They annihilate, creating two high energy photons a and b. The photon a is emitted at the angle of 90 degress with respect to the direction of the incident positron...