|
Xeluc
Traveler



Registered: 04/11/07
Posts: 746
Last seen: 6 years, 4 months
|
Understanding Light
#8323656 - 04/24/08 04:04 PM (16 years, 28 days ago) |
|
|
So I'm looking at the pixels on my LCD screen, and I realized that I can't make sense of how the light enters my eye and clear images are created. Let me explain: If you're looking at the center of your screen you have the light of the left side of the screen, which is hitting right portion of your peripheral retina, and the light from the right portion of the screen, which hits your left peripheral retina.
The screen is spitting out photons all over the place, and they CAN'T all be emitted in a perfect 0 degree angle to your eye, the Double-slit experiment proves this. So why don't some photons that were emitted from a pixel on the left side of my screen hit a different part of my eye in the middle or right? Why does every single photon hit my eye in the exact same place? I'd imagine photons would be thrown all over the place, giving a blurry image. I obviously know this to not be the case, but can't understand why. The only way I can maybe make sense of this is to think of light as waves, but I can't even comprehend how to illustrate light waves coming from my monitor. I really hope you guys understand what I'm trying to say. Can someone help me out?
|
johnm214



Registered: 05/31/07
Posts: 17,582
Loc: Americas
|
Re: Understanding Light [Re: Xeluc]
#8324237 - 04/24/08 06:59 PM (16 years, 28 days ago) |
|
|
they are scattered throughout your retina, and the universe.
Their will be regions of more intensity, however, due to how your eye focuses on light comming from a particular point. Like everything else, the brain interprets the data to a coherent image.
Look at how holograms work, kinda illustrates this idea better. You're brain constructs the image, however the raw light reflected off of them is far from the discrete image you interpret it to be.
|
trendal
J♠



Registered: 04/17/01
Posts: 20,815
Loc: Ontario, Canada
|
Re: Understanding Light [Re: Xeluc]
#8324381 - 04/24/08 07:37 PM (16 years, 28 days ago) |
|
|
The photons are emitted at a wide range of angles - it's only the ones that do enter your eye that you can see. It's also why you can see your screen from a variety of angles.
--------------------
Once, men turned their thinking over to machines in the hope that this would set them free. But that only permitted other men with machines to enslave them.
|
Xeluc
Traveler



Registered: 04/11/07
Posts: 746
Last seen: 6 years, 4 months
|
Re: Understanding Light [Re: trendal]
#8324578 - 04/24/08 08:28 PM (16 years, 28 days ago) |
|
|
Ok, I think I found the answer to my question. Thanks both of you guys for replying. I think the fact that human vision uses a lens to create a focal point keeps all the other "angles that photons are emitted from" from being seen. So the blurry image I was talking about would indeed be the case if there was no focal point. Meaning a lens "singles out" the field of view to be seen. That's the understanding I now have anyway. Does this sound correct?
|
Seuss
Error: divide byzero



Registered: 04/27/01
Posts: 23,480
Loc: Caribbean
Last seen: 3 months, 8 days
|
Re: Understanding Light [Re: Xeluc]
#8325739 - 04/25/08 01:47 AM (16 years, 28 days ago) |
|
|
> Does this sound correct?
I think so. Optics was never a strong point of mine and your terminology is a bit odd, but I think you have the basic idea. The lens in the eye focuses the light passing into the eye onto the retina. The brain controls the focus, allowing us to clearly see both near objects and far objects as we look around.
-------------------- Just another spore in the wind.
|
poke smot!
floccinocci floofinator



Registered: 01/08/03
Posts: 5,248
|
Re: Understanding Light *DELETED* [Re: Seuss]
#8326227 - 04/25/08 08:23 AM (16 years, 27 days ago) |
|
|
Post deleted by poke smot!Reason for deletion: x
|
Xeluc
Traveler



Registered: 04/11/07
Posts: 746
Last seen: 6 years, 4 months
|
Re: Understanding Light [Re: poke smot!]
#8326925 - 04/25/08 12:43 PM (16 years, 27 days ago) |
|
|
Thanks a lot poke smot! for that visualization. Everything's clear now that I have taken into effect aperture. Pun intended.
|
|