Question

How far can a human eye see

Answer 1

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$30mi.$


30 mi.

But our visual acuity extends far beyond the horizon. If Earth were flat, or if you were standing atop a mountain surveying a larger-than-usual patch of the planet, you could perceive bright lights hundreds of miles distant. On a dark night, you could even see a candle flame flickering up to 30 mi. (48 km) away.




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Answer 2

Answer is infinity.
A human with normal vision can see objects clearly placed on any point beyond 25cm.
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