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 Five Mach Five The is the racing car Speed Racer (Go Mifune in the Japanese version) drives in the anime series of the same name (known as ""Mach Go! Go! Go!"" in Japan). The car was designed, built, and created by "Pops Racer" (Daisuke Mifune), Speed Racer's father. It features a set of special devices which Speed Racer uses throughout the series. In the original 1967 series, the Mach Five is a white racing car with an "M" written on its hood (which does not stand for "Mach 5", but instead stands for "Mifune", both Go's last name, and the name