Why do your eyes physically hurt when they adjust to brighter light? | AskScience Blog

Pages

Thursday, August 9, 2018

Why do your eyes physically hurt when they adjust to brighter light?

Why do your eyes physically hurt when they adjust to brighter light?


Why do your eyes physically hurt when they adjust to brighter light?

Posted: 08 Aug 2018 03:38 PM PDT

Why do photons obey the law of equal angles, when reflected off of a mirror?

Posted: 09 Aug 2018 06:31 AM PDT

It makes sense why macroscopical particles are bounced back in an angle opposite that of their initial trajectory, when they collide with a surface. And in the wavefront-interpretation of light, where the electromagnetic wave induces a small current in the surface of a reflecting medium, causing a new wave to propagate, I can make sense of it as well..

But when viewing light as photons, reflection is, if I recall correctly, a matter of absorbtion and re-emission from a single electron. And this is were logic fails me, for why is the new photon not emitted in a completely random direction? Why is the angle fixed?

submitted by /u/ElisaKristiansen
[link] [comments]

Why are the largest lakes in North America all roughly aligned?

Posted: 08 Aug 2018 10:02 AM PDT

If you drew a somewhat curved line from The Great Slave Lake to Lake Erie, that line would go through or near 13 of the 15 largest North American lakes. Why is this? Is it a coincidence or is there a geological reason?

submitted by /u/muffinner
[link] [comments]

How would we know if Dolphins or some other animal had a language?

Posted: 08 Aug 2018 08:57 PM PDT

Dolphins have names, elephants and many kinds of birds have specific sounds to inform other of certain circumstances. These are probably not languages, but our own ancestors probably went through similar stages, so, how could we know if some animal species had a full fleshed language?, what would be the evidence to look out for?

submitted by /u/Frigorifico
[link] [comments]

What would the cancelled Superconducting supercollider have achieved?

Posted: 08 Aug 2018 11:44 PM PDT

In news articles at the time they kept on saying it would lead to more powerful rockets which got my space obsessed childhood self excited, but they never said how, was that nonsense?

submitted by /u/mrmonkeybat
[link] [comments]

How does turbulence affect velocity of objects in water?

Posted: 09 Aug 2018 03:36 AM PDT

Does it decrease an object's terminal velocity in water, or could it cause something to actually go faster?

submitted by /u/Monte_Piethon
[link] [comments]

The South River Peak and it’s surrounding ridges in the San Juan Mountains of Colorado forms almost perfect asterisk when viewed by satellite photos. There are cauldrons in the area but South River Peak is not labeled one. Can the formation of this mini-asterisk shaped-range be explained?

Posted: 09 Aug 2018 05:34 AM PDT

How does a nail grow off the nail bed?

Posted: 08 Aug 2018 08:07 PM PDT

What I'm wondering is how the skin detaches from the nail where your nail starts to grow away from your actual finger. I know that the visible nail cells are already dead, so at the boundary between where our nails actually attach to our skin and where it grows away is there a little factory of skin cells working to detach and re-attach themselves to the nail?

submitted by /u/macbowes
[link] [comments]

How can scientists measure the mass of an atom, and other subatomic particles to such extreme precision?

Posted: 08 Aug 2018 05:59 PM PDT

According to Google, a proton weighs about 1.6726219 × 10-27 kg. How can scientists measure a single proton to that level of precision (8 significant digits)?

submitted by /u/walter_melon4444
[link] [comments]

How would light travel down an isolated, infinite glass fiber?

Posted: 08 Aug 2018 08:22 PM PDT

Maybe this question showcases my lack of understanding more than anything else, but I'm wondering if there's any intersection between what the double slit experiment shows, and what would happen if you sent a beam of light down an infinite conduit.

If a beam of light is so narrowly concentrated that there is only one possible path for it to travel, and it is prevented from ever leaving this path, can it still be described as a wave?

Besides problems with infinity, is there a reason this scenario could never happen?

Let's say the beam of light was never 'observed', could the light particle ever show up outside of the tube?

Thanks!

submitted by /u/SoThisIsAmerica
[link] [comments]

Why do some clouds have well-defined edges, as opposed to forming an evenly distributed haze?

Posted: 08 Aug 2018 08:18 PM PDT

How does soap work to get rid of odors and bacteria?

Posted: 08 Aug 2018 11:44 PM PDT

I know washing with soap helps rinse away some of of your natural oils when washing any part of your body whether it be your hands, face, arm pits , groin , etc...... But everytime I ask how soap makes our hands cleaner from germs or how it makes us smell better.... The answer i get is because.... You are essentially washing away oils because one end of soap molecules love water - they are hydrophilic. The other end of soap molecules hate water - they are hydrophobic. This allows oils and grease to removed....

But how does this correlate to our hands being cleaner from germs and bacteria. And how does it correlate to removing odors from our armpits and body, etc... Are the odors, bacteria germs trapped on these oils?

How does soap work to make us cleaner?

submitted by /u/lukasthomas123
[link] [comments]

What is Gravitational Lensing?

Posted: 09 Aug 2018 03:15 AM PDT

When astronomers refer to lensing, they are talking about an effect called gravitational lensing.

submitted by /u/himansujay
[link] [comments]

Did the weight of the Apollo astronauts affect the amount of fuel in their rocket?

Posted: 08 Aug 2018 03:07 PM PDT

What are Quantum Materials, and how are they different from regular materials?

Posted: 08 Aug 2018 06:09 PM PDT

Where electrons go when they "leak" to ground?

Posted: 08 Aug 2018 08:17 AM PDT

In a electric class my teacher said Earth can drain an infinite amount of electrons or give them to us. But where they go? Or where they come from? Are there different amount of "free" electrons in the different layers of Earth?

submitted by /u/Hermogenest1
[link] [comments]

If water is a conductor, than why doesn’t everyone nearby get electrocuted when lightning strikes the ocean?

Posted: 08 Aug 2018 09:55 AM PDT

What empirical evidence is there, which I can observe from the surface, that the earth is a sphere? Does it have to involve a large body of water?

Posted: 09 Aug 2018 02:13 AM PDT

I'm not in any way a flat-earther, but I was trying to be devil's advocate yesterday and couldn't come up with anything. If I live by the sea and have good eyesight and I happen to observe a tall ship sailing away from me … it's a bit complicated.

submitted by /u/FiveYearsAgoOnReddit
[link] [comments]

No comments:

Post a Comment