411 REFERENCE · Wiktionary
Mach angle
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
thumb|Schlieren photography showing the shockwaves separating from the object
thumb|diagram of the Mach angle (angle of the shock cone against the axis of travel)
Etymology
From en Mach angle en Ernst Mach.
Noun
The angle at which shock waves separate from an object travelling supersonically. The angle is related to the Mach number of the supersonic object.