All Questions
19
questions
15
votes
2
answers
2k
views
Eye Floaters Optics
Eye floaters are these annoying objects floating in someones eye, usually seen by someone experiencing them as squiggly lines and dots buzzing around, either dark or partially transparent (I ...
- 153
0
votes
0
answers
24
views
Effects of chromatic aberration in the human eye
Due to metamerism, many different light spectra can be used to show a white colour.
If I understand it correctly, it is even possible to make white light by combining only two monochromatic light ...
1
vote
3
answers
219
views
How come light in the Violet spectrum looks like a mixture of Red and Blue, even though they are of different wavelength? [duplicate]
How come pure monocromatic light in the violet spectrum is perceived by us as light that is a superposition of 2 other, different wavelength light.
is there some scattering process in the eye that ...
- 411
0
votes
3
answers
111
views
A single eye vision vs normal vision [closed]
I am trying to understand the basics of human vision and looking for a model to see pros and cons of a single eye vision vs two eyes vision. Generally my interest relates to a basic project in a ...
0
votes
3
answers
126
views
When does the retina fail to recognize images of two closely separated points as distinct?
Our eye is a lens and lenses have a resolving power. The resolving power of a lens, physically speaking, is related to how good two closely separated points A and B can be distinguished as separate. ...
- 11.8k
1
vote
2
answers
1k
views
Depth of field of the human eye
When reading about the basics of photography and the physics involved, I learned about depth of field. Long story short, the message is that with a smaller aperture, the length of the depth of field ...
- 193
1
vote
0
answers
48
views
Do prescription glasses augment or mitigate the effect of the sun on the skin around the eyes directly beneath them (assuming no UV blocking coating)?
The question is about minus correction (nearsightedness), but would also be interesting to know how it differs for plus correction (farsightedness), cylinder correction (astigmatism), axis correction.
- 39
4
votes
1
answer
1k
views
Distinguishing monochromatic light from light of a mixture of wavelengths, both of same colour [duplicate]
Red, green, and blue are the primary colors of light—they can be combined in different proportions to make all other colors. For example, red light and green light added together are seen as yellow ...
- 1,723
0
votes
1
answer
600
views
How can we see violet color when its wavelength is smaller than blue?
From my understanding of our eyesight, we have red, blue, and green cones in our eyes that allow us to see color. If the wavelength of violet is smaller than blue (and green and red also) how can we ...
user158819
0
votes
1
answer
114
views
What happens to photons, electrons, etc [duplicate]
What happens to photons when they hit our eye? where do they end up? if they generate heat, why our eye don't get overheated?
Similarly what happens to electrons when the light hits certain metals, ...
- 117
2
votes
1
answer
1k
views
Why do we see just one octave of light? [closed]
When one takes a look at the usual chart of EM spectrum one cannot help but notice that visible spectrum is slightly below one octave of frequencies; that is, the ratio between the highest and least ...
- 1,951
0
votes
1
answer
400
views
Correcting Myopia with a Diverging Lens
My textbook says that a diverging lens works by rendering the object a virtual image at the myopic eye’s far point. However, wouldn’t the eye then perceive an object farther than its far point at the ...
- 1,499
16
votes
9
answers
26k
views
Why can't we see infrared light?
While explaining to my nephew about the physics of light, I told him we cannot see infrared color, and he kicked back with a very simple question: why can't we see it? I could not tell him. Is the ...
- 271
27
votes
6
answers
11k
views
How do we see? Where do the photons disappear?
I know that the light is reflected from a object to my eyes, but I don't understand exactly how. The photons appear from the light source and disappear in my eye! Can someone explain the phenomenon of ...
- 608
0
votes
0
answers
68
views
Chromatic aberration in human eye [duplicate]
A lens focuses the different colours of white light at different points. Since our eye has a convex lens there should also be such an aberration but we see objects clearly with normal eye. I want to ...
- 281