III. Six Books on Light and Shade: 181.
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III. Six Books on Light and Shade: 181.
181.
A light which is smaller than the body it illuminates produces shadows of which the outlines end within [the surface of] the body, and not much compound shadow; and falls on less than half of it. A light which is larger than the body it illuminates, falls on more than half of it, and produces much compound shadow.
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