2007-07-12 18:02:37 · 5 answers · asked by box792020 1 in Science & Mathematics ➔ Biology
The human eye can see incredibly far. Seeing the stars in the sky is proof. However, your question isn't so much as "how far can we see", but a matter of "what can we see at a given distance"? This all depends on what psychologists call a threshold. A threshold is the intensity something has to be at a given distance in order for it to be visible. Someone already stated that you can see a lit candle at 300 ft in the dark. I can't confirm it's accuracy, but this would be an example of threshold. The threshold in this case is the farthest distance the candle can be before you can't see it, or it's how intense it has to be before it's visible at a given distance (it all depends on your variable).
Hope that helps!
2007-07-12 18:12:46 · answer #1 · answered by M 4 · 0⤊ 0⤋
Hundreds of thousands of light years. Some galaxies are visible to the naked eye.
2007-07-13 01:07:33 · answer #2 · answered by Anonymous · 1⤊ 0⤋
The act of seeing is just light hitting your eyeball. So what you're really asking is "how far can light travel?".
The answer is "an infinite distance". Light will travel ANY distance through space, because there's nothing to stop it.
2007-07-13 01:14:35 · answer #3 · answered by lithiumdeuteride 7 · 0⤊ 1⤋
supposedly 300 feet from a lit candle on a clear dark night....
2007-07-13 01:06:27 · answer #4 · answered by heavenly_rain_angel 2 · 0⤊ 0⤋
well my eyes suck so not that far but with my contacts in i can see just as far as u
2007-07-13 02:53:50 · answer #5 · answered by superdawg42091 3 · 1⤊ 0⤋