Is it possible to feel "high" without using drugs?

Is it possible to feel "high" without using drugs?
Why could I only see out of one lens in the 3D cinema where as my SO could see out of both?
Does radiation stay close to the ground, rise, or go everywhere ? For example would it be "safe" to be inside a canyon or on top of a building ?
Other than light, what is the fastest thing we have ever observed?
Why do people put salt on icy roads?
How can near-infrared light detect veins in a person's skin?
Do blind animals still turn their heads to stare at sudden noises?
Why is it that while experiencing multiple days of intense sleep deprivation, I begin to lose my ever-persisting bout of anxiety and feel a melancholic sense of well-being?
We can be both too cold and too hot for homeostasis, why does being cold seem to cause more sickness?
Where do the emitted photons go when we switch frames for a charged particles falling in a gravitational field?
Why is the speed of light 299 792 458 m/s in a vacuum? Why not faster or slower?
If a person is born without all senses would they have any experience?
Why do thylakoids form stacks within the chloroplast?
Why does visible light not cause eye damage?
Doesn't the no-communication theorem directly conflit this article from stanford?
Why do we lose consciousness when exposed to high levels of radiation?
What physical differences allow one CPU to be faster than other at the same clock speed?

Posted: 26 Nov 2015 06:15 PM PST

submitted by Veshter
[link] [346 comments]

Why could I only see out of one lens in the 3D cinema where as my SO could see out of both?

Posted: 26 Nov 2015 05:59 PM PST

So a few days ago me and my SO went to IMAX, which is a 3D cinema with "laser technology" , whilst watching the previews i noticed that i could only see out of one eye through the glasses, i asked my SO and she said she could see out of both, we swapped glasses and it was the same situation. I am aware of light polarization and how it works but my question is why only I had the issue of only being able to see through one lens and not my SO. What could have caused this?

submitted by slothsandstuffyeh
[link] [24 comments]

Does radiation stay close to the ground, rise, or go everywhere ? For example would it be "safe" to be inside a canyon or on top of a building ?

Posted: 27 Nov 2015 04:34 AM PST

I want to write a short story set in a post nuculear war world and want to keep it as accurate as possible.

Also if you would be willing to share some more info (theories and such) on how the world would be after a nuculear war (what/who would survive, how would the enviroment be, where and how the last humans would settle if they survive) that would be great.

submitted by The-Tewby
[link] [6 comments]

Other than light, what is the fastest thing we have ever observed?

Posted: 26 Nov 2015 11:19 PM PST

submitted by _flume_
[link] [22 comments]

Why do people put salt on icy roads?

Posted: 27 Nov 2015 04:22 AM PST

submitted by Ishitalamba
[link] [3 comments]

How can near-infrared light detect veins in a person's skin?

Posted: 27 Nov 2015 05:29 AM PST

I'm trying to figure out how this is happening. I'm just not satisfied with her explanation.

http://www.cnet.com/news/near-infrared-makes-veins-easier-to-find/

submitted by Siege2Sage
[link] [7 comments]

Do blind animals still turn their heads to stare at sudden noises?

Posted: 26 Nov 2015 09:09 PM PST

submitted by limeburst2
[link] [8 comments]

Why is it that while experiencing multiple days of intense sleep deprivation, I begin to lose my ever-persisting bout of anxiety and feel a melancholic sense of well-being?

Posted: 27 Nov 2015 01:42 AM PST

Just curious as to why this happens...if anyone can relate to the feeling. It's almost like a sense of self-pity takes over and gives me an ego boost...

submitted by ComplacentCamera
[link] [2 comments]

We can be both too cold and too hot for homeostasis, why does being cold seem to cause more sickness?

Posted: 26 Nov 2015 09:20 AM PST

Everyone seems to catch colds in the winter... but even in the dead summer of Arizona heat people aren't falling ill. Why?

submitted by Observante
[link] [12 comments]

Where do the emitted photons go when we switch frames for a charged particles falling in a gravitational field?

Posted: 26 Nov 2015 11:29 PM PST

There is a (solved) paradox in general relativity of what happen to a charged particle in a gravitational field. Here is the issue: a charged particle moving under the influence of gravity alone is "weightless", so it shouldn't emit any radiation. But classically we would assume that the charge is accelerating and emitting radiation, from a non-inertial rest frame (like someone standing on the earth) general relativity also agrees that the particle emits radiation.

If the radiation was entirely described classically by Maxwell's equations, I could wrap my head around this difference. But I am bothered by the idea of real photons being emitted by the charge in one frame but not in another. Real particles should exist in all reference frames. And the photons are originating from the charged object, so I don't see how a co-moving observer can fail to detect them go by.

In found a similar question came up in askphysics a while back, but the only suggestion there is that the radiation is emitted outside of the light cone of the co-moving observer. I don't see how that would work, given that the observer could just put a sphere of photodetectors around the charge in the co-moving frame. There are also some links to papers on the wiki page, but I couldn't access them right now (I might be able to open them at work when I get back there).

submitted by AugustusFink-nottle
[link] [1 comment]

Why is the speed of light 299 792 458 m/s in a vacuum? Why not faster or slower?

Posted: 26 Nov 2015 08:29 AM PST

submitted by Phreddi
[link] [14 comments]

If a person is born without all senses would they have any experience?

Posted: 26 Nov 2015 12:50 PM PST

If the mind is related to the body because it is how it acquires any information about the world, is it possible for someone who is born without any sense lack the ability to gain experiences/memories. As if he/she is just a husk of a person, or incredibly comatose. But in this case, he hasn't seen the world therefore having no memories of it, which could be similar to living in a world of total blankness and having no consciousness that he/she is alive.

submitted by supermamajama
[link] [3 comments]

Why do thylakoids form stacks within the chloroplast?

Posted: 26 Nov 2015 03:40 PM PST

submitted by superhelical
[link] [2 comments]

Why does visible light not cause eye damage?

Posted: 26 Nov 2015 08:41 AM PST

Since visible light is higher on the EM scale and has more energy than Infrared, then why does visible light not damage our eyes while infrared does (at long exposures)

submitted by rostik002
[link] [6 comments]

Doesn't the no-communication theorem directly conflit this article from stanford?

Posted: 26 Nov 2015 06:08 PM PST

http://news.stanford.edu/news/2015/november/cryptography-quantum-tangle-112415.html

No communication theorem wikipedia article: https://en.wikipedia.org/wiki/No-communication_theorem

submitted by fireflambe
[link] [2 comments]

Why do we lose consciousness when exposed to high levels of radiation?

Posted: 26 Nov 2015 08:24 AM PST

For the most part, I feel I have a cursory understanding of why the other systems and organs fail in such a circumstance. But most of the info and stories I've looked up also mention the victims fainting or losing consciousness minutes or hours later, but never explaining why.

submitted by AGreenSmudge
[link] [7 comments]

What physical differences allow one CPU to be faster than other at the same clock speed?

Posted: 26 Nov 2015 09:08 AM PST

submitted by hcrocker
[link] [10 comments]