angle of incidence
- the angle that a light ray or electromagnetic wave striking a surface makes with a line perpendicular to the reflecting surface
- Chiefly Brit. angle of attack
- Aeron. a permanent angle between the chord of an airfoil and the horizontally level fuselage
See angle of incidence in American Heritage Dictionary 4
noun The angle formed by a ray incident on a surface and a perpendicular to the surface at the point of incidence.
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