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1. The smallest angle of incidence at which a light ray passing from one medium to another less refractive medium can be totally reflected from the boundary between the two.
2. The angle of attack of an airfoil at which airflow abruptly changes, causing changes in the lift and drag of an aircraft.
1. (General Physics) the smallest possible angle of incidence for which light rays are totally reflected at an interface between substances of different refractive index
2. (Aeronautics) another name for stalling angle
1. 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.
2. the angle of attack at which a sudden change in airflow occurs around the wings of an aircraft, reducing lift and increasing drag.
The smallest angle of incidence at which a light ray can be completely reflected from the boundary between two media.