All Questions
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How to explain interference pattern in our eye?
Suppose we got a Lamp L that emits some light. The light afterwards hits a diffraction Grating G at a distance a. Now if you were to look through the grating with your Eye E, you were to see the ...
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3
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Why are diffraction spikes from bright light sources longer with larger pupil than with smaller?
In photography, it's well known that reducing the aperture leads to the starburst effect, like in the following photo:
(source)
This happens due to diffraction on the aperture, which has a polygonal ...
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Why do some kind of black bands or lines appear when I'm just about to touch two fingers ?There is a second question too [duplicate]
I don't know if I can explain this well. The effect is best visible when you keep your hand in front of a light source. When I'm almost about to touch any 2 fingers (assume between your thumb and ...
user248823
24
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3
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Why do I see three 'beams' when I look to a distant light source at dark?
In the night, when I look at a distant light source (for example a street lamp a few hundred meters away) I do not simply see a spot but rather a spot which is surrounded by 'light beams'.
So instead ...
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Why do we see vertical lines when we close our eyes into slits?
When we close our eyes into small slits and look at a light source we see vertical lines of light coming out. Why does this happen? Is it something to do with our eyelashes or is it because of ...
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2
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Physics about Seurat's painting [closed]
The following figure is Georges Seurat's work: A Sunday Afternoon on the Island of La Grande Jatte,created by the technique known as pointillism, in 1884-1886.
This painting consists of closely ...
- 1,757
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Is the human eye diffraction limited, or is there another limiting factor?
I know that most problems involving the human eye in my undergrad physics text book tell the student to treat the human eye as a diffraction limited system (ie to assume the only factor limiting human ...
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Squinting at light sources [duplicate]
I am sure it's just your eyelashes creating a filtering effects, but if you look a a bright(ish) light source such as a lightbulb while squinting, if looks like you are seeing straight light rays ...
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Squinting at street lights
Simple question, I've always wanted to know the answer to this.
Why do you see a pair of lines radiating out from street lights when you squint at them? I can't think of a better way to describe what ...
user5335