caclculate angle of incidence and angle of reflection
Free calculate the angle of incidence from the surface normal and incident ray direction for reflection and refraction calculations.
Input Parameters
Angle from horizontal (0° = horizontal)
Angle of incoming ray from horizontal
Results
Enter angles to calculate angle of incidence
Angle of Incidence
Definition
The angle of incidence is the angle between the incident ray and the surface normal.
θᵢ = |θᵣₐᵧ - θₙₒᵣₘₐₗ|
Key Points
- • Measured from normal (90° from surface)
- • Always between 0° and 90°
- • Equal to angle of reflection
- • Used in Snell's law for refraction