Tagged Questions
17
votes
2answers
929 views
Why myopic people see this picture differently?
I found the following picture in the Internet and I am curious how from a physicist point of view to explain it.
Basically the idea is the following. If you are a normal person - you suppose to see ...
2
votes
2answers
56 views
Hyperopia, Far Sightedness
With hyperopia, the focal point is behind the retina, shouldn't this mean that the image is flipped on the retina itself from what is usual?
I must be drawing my ray diagrams wrong.
A little ...
3
votes
3answers
261 views
Why we see upright images?
Since it's convex lens there in our eyes so image formed on our retina is inverted, so how come that we see upright images?
3
votes
4answers
266 views
Eye sensitivity & Danger signal
Why are danger signal in red, when the eye is most sensitive to yellow-green?
You can check luminosity function for more details...
5
votes
2answers
151 views
What is the minimum optical power detectable by human eye?
If one is in complete darkness, what is the minimum optical power that the eye can "see" (let's say in 500-600 nm range).
I found that for 510 nm, 90 photons can be detected ...
41
votes
10answers
4k views
Is it possible that there is a color our human eye can't see?
Is it possible that there's a color that our eye couldn't see? Like all of us are color blind to it.
If there is, is it possible to detect/identify it?
4
votes
1answer
74 views
Human eyes vs aberrations
There are no perfect lenses in nature. Aberrations of some kind will always be there. But why healthy human eyes circumvent this issue? Or, are there any aberrations we don't "see?"
10
votes
0answers
475 views
Why does the moon look bigger at the horizon? [duplicate]
Possible Duplicate:
Why does the moon sometimes appear giant and a orange red color near the horizon?
Why does the moon look bigger at horizon or skyline than at other times e.g. at ...
2
votes
2answers
420 views
Do we see color with higher frequency first?
Out of the 7 colours of the rainbow, violet has the highest frequency and the smallest wavelength. Does this mean that our eye sees it first? If yes, then why? Does it travel at the same or higher ...
5
votes
5answers
3k views
Eyes open under water
Yesterday I looked underwater with my eyes open (and no goggles) and I realized I can't see anything clearly. Everything looks very, very blurry. My guess is that the eye needs direct contact with air ...
