Solar eclipses appear as cresent shaped spots of light on the ground beneath trees. The small opening between?
leaves act as pinhole cameras, casting images of the sun on the ground. Just before and after an eclipse, the spots are circular. It so happens that a spot 10 cm in diameter is cast by an opening 100 times higher. So a 10 cm spot is cast by an opening 10 m above the ground. How high above the ground is an opening that casts a spot 15 cm in diameter?
would think it to be 15 meters if it's 100 times 15 cm.
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