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The Double Slit experiment

Hits: 46354 | Rating: (3.6) | Category: Science | Added by: ICN
Page: 1 2 35 6 7 8 Next >   Jump to: Bottom    Last Post
Groogle
Male, 30-39, Canada
 2180 Posts
Sunday, July 29, 2007 3:43:47 PM
Electrons are particles but they're intangible just like electricity.

The observer in this scenario was some sort of electrical device so you can guess that those electrons where affected by the device the same was a magnet would be affected by another magnet.


kairobert
Male, 18-29, Europe
 1634 Posts
Sunday, July 29, 2007 3:38:40 PM
magnetism from the measuring device or some sort of other interference could have affected the electrons

MCFLYYY
Male, 18-29, Midwest US
 26 Posts
Sunday, July 29, 2007 3:06:21 PM
The point of using detectors is because scientists are baffled as to how a single electron can pass thru two separate slits at the same time. A detector would tell them how this happens. But it just so happens that using a detector negates the interference pattern, and the electron behaves just like a marble, as the video describes.

snoopdawgg
Male, 18-29, Asia
 486 Posts
Sunday, July 29, 2007 3:03:51 PM
o so according to mcflyyy... the experiment is done wrong then.. because the detectors are interfering with the electrons.

NumbuhZero
Female, 18-29, Southern US
 862 Posts
Sunday, July 29, 2007 2:55:36 PM
D=
That is amazing, confusing, and it makes me kind of sad.
There are some things we just can't figure out.

MCFLYYY
Male, 18-29, Midwest US
 26 Posts
Sunday, July 29, 2007 2:55:27 PM
They weren't observed, the video falsey portrays this. There are detectors inside each of the slits that detect when an electron passes thru. They aren't visual detectors, so there has to be some sort of physical interaction between the electron and the detector, or else it wouldn't detect it. An electron, moving at almost the speed of light, effectively exists at almost every point, and passes thru both slits, thus interfering with itself. But when its detected, it can no longer be pasing thru both, but must be present in one of the slits, and must behave like a particle. Nothing to do with watching.

12natalie
Female, 13-17, Eastern US
 87 Posts
Sunday, July 29, 2007 2:50:24 PM
Sry MCFLYYY, I should have waited for your 2nd post. But you can't say it has nothing to do with observing the experiment. The fact of the matter is that there is a different outcome pattern of the electrons after they have been observed.

Qpax
Male, 18-29, Europe
 2340 Posts
Sunday, July 29, 2007 2:49:23 PM
I remember this from A-Level physics.

Basically, light is magical.


MCFLYYY
Male, 18-29, Midwest US
 26 Posts
Sunday, July 29, 2007 2:44:39 PM
Electrons dont have minds of their own, thats just the kiddie way of putting it that the video uses. It falsely suggests that electrons decide sentinently what to do in a situation, when that is not the case.

Invad3r_Tak
Female, 13-17, Eastern US
 69 Posts
Sunday, July 29, 2007 2:43:27 PM
Oh, jeez, education! It's summer, I'm not supposed to be learning anything...

But hey, I guess I learned something.


12natalie
Female, 13-17, Eastern US
 87 Posts
Sunday, July 29, 2007 2:41:46 PM
^^ This was great! Quantum physics is so crazay.
Isn't this basically the same thing as Schroedinger's Cat? (I'm sure I spelled that wrong)

"So it has NOTHING to do with the fact that someone is 'watching' the experiment. Electrons don't change their minds of what to do based on whether someones watching or not."
No, that really IS a phenomenon that happens. Just because they weren't watching it with their eyes doesn't mean they weren't perceiving what was happening.


MCFLYYY
Male, 18-29, Midwest US
 26 Posts
Sunday, July 29, 2007 2:40:31 PM
...This explains how the single electron beam can behave like a wave, and cause a wave like pattern on the board. This also explains how a single electron passes thru both slits, even tho its only a single particle. And while this is controversial, its still true. However, when detectors are placed in the slits, the electron is forced to register its presence somewhere in that slit, when it contacts the detector, and therefore can't act like a wave anymore, and must continue on like a particle. What happens is the electron registers on the detector, and this throws it ever so slightly out of 'harmony' which throws off its wave pattern, and it can no longer interfere with itself, negating its wave pattern on the wall, and producing the particle pattern instead

deaf_woman
Male, 30-39, Europe
 2719 Posts
Sunday, July 29, 2007 2:37:20 PM
Seriously, I'm pretty sure it has something to do with ghosts.

MCFLYYY
Male, 18-29, Midwest US
 26 Posts
Sunday, July 29, 2007 2:36:27 PM
I had to join this site just to respond to some of these ignorant people.

First off, when they talk about 'observing' the electron, they don't mean putting a camera and 'watching' it, as the video suggest. What they do is put tiny detectors in each of the slits which monitor whether or not an electron passes thru. So it has NOTHING to do with the fact that someone is 'watching' the experiment. Electrons don't change their minds of what to do based on whether someones watching or not. So quit talking about trees in forests and ur reflection in the mirror (it doesn't disappear don't worry). The world does not change just because you watch it or not.

Now about electrons. True, they do have negligible mass, but they still travel at near the speed of light, meaning that an electron CAN be at many places at once. When you turn a light on, it immediately fills the room, and an electron can almost do the same...


larajunky
Female, 40-49, Western US
 2243 Posts
Sunday, July 29, 2007 2:09:56 PM
WTF indeed

keg74
Male, 30-39, Southern US
 340 Posts
Sunday, July 29, 2007 2:03:22 PM
That was awesome! I'm not the sharpest knife in the drawer when it comes to quantum physics or theory but I am fascinated by it so having it broken down Barney style is great. The mysteries of science are so much cooler than the mysteries of religion, because you mysteries of science might actually be solved one day. Great vid.

Ani187
Female, 30-39, Midwest US
 4532 Posts
Sunday, July 29, 2007 1:31:35 PM
So, there really is power in the power of observation?

Llamaz
Male, 13-17, Southern US
 340 Posts
Sunday, July 29, 2007 1:28:55 PM
Interesting.

sertrbl
Male, 18-29, Midwest US
 1452 Posts
Sunday, July 29, 2007 1:28:38 PM
"I wish he would have used a word other than "slit" over and over again.

::is a perv::"
man, i was thinking that the whole time.

"and its ppl like you that makes most humans uneducated"
uh, you just said "ppl". i wouldn't call someone uneducated, especially just because they believe something different than you.


thetoastking
Male, 18-29, Europe
 629 Posts
Sunday, July 29, 2007 1:19:41 PM
i found liquid glasses comment very interesting. when no one is looking at something is it still there? we will probably never know.. i liked the other dr quantum animation it kind of helps you understand how there could be another dimension but we would never be able to see it properly because were not that advanced

thetoastking
Male, 18-29, Europe
 629 Posts
Sunday, July 29, 2007 12:56:43 PM
thats one of the drating coolest things ive ever seen

dragonrice
Male, 18-29, Canada
 640 Posts
Sunday, July 29, 2007 12:19:46 PM
This made more sense than my grade 11 physics teacher trying to explain it

mikeyisred
Female, 13-17, Eastern US
 161 Posts
Sunday, July 29, 2007 12:14:47 PM
the observer effect! w00t!
and omgwtfbbqhax, according to these physics, when a tree falls in the forest and nobody is there to hear it, the tree both does and does not exist, and did and did not fall. get it?

EVERYBODY GO RENT/BUY/WATCH WHAT THE BLEEP DO WE KNOW. good movie. especially if you're into quantum mechanics.


scar104
Male, 13-17, Southern US
 361 Posts
Sunday, July 29, 2007 12:06:37 PM
AAAAARRRRRGGGGHHHHH!

Tuburculosis
Female, 70 & Over, Australia
 108 Posts
Sunday, July 29, 2007 11:40:34 AM
I already knew this. Everyone ought to watch What the Bleep do we Know.

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