Definitions for critical angle
This page provides all possible meanings and translations of the word critical angle
Random House Webster's College Dictionary
the minimum angle of incidence beyond which total internal reflection occurs for light traveling from a medium of higher to one of lower index of refraction.
the angle of attack at which a sudden change in airflow occurs around the wings of an aircraft, reducing lift and increasing drag.
Origin of critical angle:
the smallest angle of incidence for which light is totally reflected
The smallest angle of incidence for which light is totally reflected from a boundary between one medium and a less refractive one
The smallest angle of attack of an airfoil at which lift suddenly decreases and drag suddenly increases
The smallest angle of a ramp or stairs considered uncomfortable or unsafe
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"critical angle." Definitions.net. STANDS4 LLC, 2013. Web. 6 Dec. 2013. <http://www.definitions.net/definition/critical angle>.