This came up the other day while I was teaching optics -- when Jack takes
Piggy's glasses to start a fire on a sunny day (Chapter 2, Fire On The
Mountain). I've always heard (and there's plenty of info online) that the
story is flawed because Piggy is NEARsighted and thus wears diverging
lenses which could not be used to start a fire. However, the text reads:
*...Give 'em back. I can hardly see...*
*...Jus' blurs, that's all. Hardly see my hand....*
This implies that Piggy is actually FARsighted and thus wears converging
lenses.
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