The angle of incidence of a ray to a surface is measured as the difference in angle between the ray and the normal vector of the surface at the point of intersection.

# Angle of Incidence

## See also

Angle, Angle of Attack
*This entry contributed by Wiktor
K. Macura*

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## Cite this as:

Macura, Wiktor K. "Angle of Incidence." From *MathWorld*--A Wolfram Web Resource, created by Eric
W. Weisstein. https://mathworld.wolfram.com/AngleofIncidence.html