the angle between a refracted ray and a line drawn normal to the interface between two media at the point of refraction.
the angle that a refracted beam of radiation makes with the normal to the surface between two media at the point of refraction
angle of refraction
The angle formed by the path of refracted light or other radiation and a line drawn perpendicular to the refracting surface at the point where the refraction occurred.
- Angle of roll
the acute angle between the lateral axis of an aircraft or spacecraft and a horizontal plane.
- Angle of rib
angle of rib angle of rib n. The abrupt change in curvature of the external surface of a rib where the rib is bent in two directions and twisted along its axis. Also called costal angle.
- Angle of slide
the minimum slope, measured in degrees from the horizontal, at which loose solid material will start to slide or flow.
- Angle of stall