Illumination Angle in Illumination Formulas

The illumination angle refers to the angle at which light is emitted from a light source and spreads over a surface. And is denoted by θ. Illumination Angle is usually measured using the Degree for Angle. Note that the value of Illumination Angle is always negative.

Illumination formulas that make use of Illumination Angle

fxIllumination by Lambert Cosine LawGo

fxLuminanceGo

FAQ

What is the Illumination Angle?

The illumination angle refers to the angle at which light is emitted from a light source and spreads over a surface. Illumination Angle is usually measured using the Degree for Angle. Note that the value of Illumination Angle is always negative.

Can the Illumination Angle be negative?

Yes, the Illumination Angle, measured in Angle can be negative.

What unit is used to measure Illumination Angle?

Illumination Angle is usually measured using the Degree[°] for Angle. Radian[°], Minute[°], Second[°] are the few other units in which Illumination Angle can be measured.

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