Say we have a jar of water, Is the angle of incidence, the angle that the the light enters the water, the angle above the water or the angle below the water?
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Angle of incidence is a measure of deviation of something from "straight on" and may refer to: Angle of incidence (aerodynamics), the angle between the chord of the wing and the longitudinal axis of the fuselage. Angle of incidence (optics), describing the approach of a ray to surface.
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