FAQ

What is the Angle to Normal?
Angle to Normal is the angle between the luminous intensity ray and the normal. Angle to Normal is usually measured using the Radian for Angle. Note that the value of Angle to Normal is always positive.
Can the Angle to Normal be negative?
No, the Angle to Normal, measured in Angle cannot be negative.
What unit is used to measure Angle to Normal?
Angle to Normal is usually measured using the Radian[rad] for Angle. Degree[rad], Minute[rad], Second[rad] are the few other units in which Angle to Normal can be measured.
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