Mach Diamonds: Winner Of "Excellent Slow Motion" Award
Source: Vision Research, Inc.
Mach disks, or “shock diamonds,” are the result of standing shockwaves caused by abrupt pressure changes, usually only seen in the under expanded flow of gas from a jet engine. As the winner of the “Excellent Slow Motion Award” at ICHSIP 31 in Osaka, Japan, this video sequence shows the liftoff of a pressurized PET drink bottle from a toy rocket captured with a Phantom Camera at 50,000 fps, and slowed for viewing by factor of 2,000.