| We test the matrix theory conjecture in the pp-wave by studying two-body interactions between gravitons and membranes. We compute the one-loop effective potential of matrix theory and compare it to the light cone Lagrangian of linearized supergravity. We have exact agreement in the absence of M-momentum transfer. We also find the effective potential that smoothly interpolates between the spherical membrane result and the graviton result. We also collect here partial results from our investigation of interactions with M-momentum transfer. |