SizesProp02
- Author:
- A. G. Gomez (agg29@ou.ac.uk)
Illustration of Proposition 2 of the book On Sizes.
If a sphere is illuminated by a sphere greater than itself, the illuminated portion of the former sphere will be greater than a hemisphere (Heath, 1913:358).
Prop. 2 shows that, because the sun is much larger than the moon, the lit side of the moon is greater than a hemisphere.
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