Angle of Incidence

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Angle of Incidence

1. The angle at which a ray of energy impinges upon a surface, usually measured between the direction of propagation of the energy and a perpendicular to the surface at the point of impingement, or incidence. Compare angle of arrival. See also angle of reflection, angle of refraction.
In some cases involving radio waves, the angle of incidence is measured relative to the surface.

2. = angle of attack. (British usage).

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use