Angle of incidence is a measure of deviation of something from "straight on" and may refer to:
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Angle of incidence (aerodynamics) On fixed-wing aircraft, the angle of incidence (sometimes referred to as the ''mounting angle'' or ''setting angle'') is the angle between the chord line of the wing where the wing is mounted to the fuselage, and a reference axis along the fuselage ...
, angle between a wing chord and the longitudinal axis, as distinct from
angle of attack
In fluid dynamics, angle of attack (AOA, α, or \alpha) is the angle between a reference line on a body (often the chord line of an airfoil) and the vector representing the relative motion between the body and the fluid through which it is m ...
, which is relative to the airflow
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Angle of incidence (optics), describing the approach of a ray to a surface
{{disambiguation