The net charge before & after is zero. The reverse reaction, electron– positron creation, is a form of pair production governed by two-photon physics.It uses a modified version of the Unreal engine & the Havok physics engine. Jack suspects that it was more than just a Scavenger conflict, as the surface to air missile was too . Uploaded maps then can be played online or over a LAN.Luis Alvarez (A.B. 1932, S.M. 1934, Ph.D. 1936) - Physics, 1968. . Tucker Max ( A.B. 1998) - Internet celebrity & New York Times bestselling author. Sciences; 9.6 Department of Life Sciences; 9.7 Department of Mathematics; 9.8 Department of Physics . 2005, IGF Student Showcase, Scavenger Hunt