Ernst Mach of experimental physics concentrated on the interference, diffraction, polarization and refraction of light in different media under external influences. From there followed important explorations in the field of supersonic fluid mechanics. Mach and physicist-photographer Peter Salcher presented their paper on this subject in 1887; it correctly describes the sound effects observed during the supersonic motion of a projectile. They deduced and experimentally confirmed the existence of a shock wave of conical shape, with the projectile at the apex. The ratio of the speed of a fluid to the local speed of sound "v"/"v" is now called the Mach number. It
Mach Rider against a hazard on the track, they obtain more points— this also replenishes Mach Rider's bullets. "Mach Rider" takes place in the year 2112, and planet Earth has been invaded by evil forces driving vehicles known as Quadrunners. The player controls Mach Rider, who travels from sector to sector on a high-powered superbike, searching for survivors and destroying any enemies in their path. In 1972, "Mach Rider" was originally released as a plastic race car or hot rod toy also by Nintendo that came with a ramp for jumping and a stick shift-like object with three different kinds of meters