Bethel University 1 article published in JoVE Engineering High-Speed Optical Diagnostics of a Supersonic Ping-Pong Cannon Travis J. Barth*1, Keith R. Stein*1 1Department of Physics and Engineering, Bethel University We describe a method for the construction of a supersonic ping-pong cannon (SSPPC) along with optical diagnostic techniques for the measurement of ball velocities and the characterization of propagating shock waves during the firing of the cannon.