Long shadows reveal texture; short ones flatten it. Enter an object's height and the sun's altitude to get its shadow length — or measure a shadow to find the sun angle. You can also compute the sun's altitude for any place, date and time.
How it works
Shadow = h ÷ tan(altitude); altitude = atan(h ÷ shadow).
FAQ
At what sun angle is light 'golden'?
Below about 6° above the horizon; shadows are then roughly ten times longer than the object is tall.
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