Calculate Shadow Casting: Length, Height, Altitude of the Sun
A simple calculator for shadow casting: height of the Sun, height of the object or shadow length, as well as the ratio between shadow length and object height can be determined. The height of the Sun is given in degrees. Object height and shadow length have the same unit, e.g. feet or meters. See also shadow length and direction by coordinates and time.
l = h * cot(α)
α = arccot(l/h)
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