b = Morning sun c = Morning shadow
b1 = Noon sun c1 = Noon shadow
b2 = Afternoon sun c2 = Afternoon shadow
In the moment of the noon, the shortest shadow is produced and that shadow invariably points to the geographical North in that hemisphere (see fig. 2) - with the exception of a post that intersectes the ecliptic, where at noon there will be no shadow at all.
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