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Dr Quantum - Double Slit Experiment

Hits: 2435 | Rating: (3.6) | Category: Science | Added by: ElectricEye
Jump to: Bottom    Last Post
axeman929
Male, 30-39, Midwest US
 189 Posts
Saturday, June 21, 2014 12:39:42 AM
Everybody looking for a threesome.

SavageChef
Female, 50-59, Western US
 2000 Posts
Thursday, June 19, 2014 12:58:15 AM
It's like Doctor Demento went on a diet and became a scientist. Cool. However, I'm still too stupid to understand the explanation. Slow it down to extra-dumb, and I'll watch it again.

patchouly
Male, 40-49, Canada
 4482 Posts
Tuesday, June 17, 2014 5:10:26 AM
@HolyGod,
Yes. As creepy as I always find it, the idea that things aren't static until you make them static does lend credence to the Multiple timeline/Universe theory. It really sort of explains how it works.

5Cats
Male, 50-59, Canada
 24220 Posts
Monday, June 16, 2014 11:36:28 PM
@Draculya: Heisenberg? Close, but it's a different matter.

Photons have even less claim to "mass" than electrons! For them to be a wave is less "far fetched" although it's also hard to believe.

Essentially?
WE DO NOT KNOW IT ALL!
At least not yet.
To pretend otherwise is Hubris...

Draculya
Male, 40-49, Asia
 11548 Posts
Monday, June 16, 2014 9:44:57 PM
I'll tell you what blows my mind: not the electrons, but much larger molecules of up to 10,000 atomic masses also exhibit this behaviour.

Also, if you think you have gotten your head round the double slit experiment and want to deepen your mind-fck:

Delayed Choice Quantum Eraser

Draculya
Male, 40-49, Asia
 11548 Posts
Monday, June 16, 2014 9:26:35 PM
Heisenberg (not Walter White)

5Cats
Male, 50-59, Canada
 24220 Posts
Monday, June 16, 2014 8:25:58 PM
@captkava: I SEE what you did OR DID NOT do there!

@hg: Schrodinger's Cat! = yes!
Everett-Wheeler (Many Worlds Theory) = Nope!

I'm a "ONE world theory" kind of cat! Parmenides is my hero! (Along with Zeno!!)

@OldOllie is correct: Electrons do not exist until we observe them! Measure, detect, see how other things react, they're slippery little... things!

@Rick_S: I've read the opposite of that. Probably RA Wilson. When big objects actually do the double slit? They make 2 lovely, clean lines. Reflecting off the edges does NOT make the highly re-producible multiple lines of an interference pattern. It makes random dots here and there.
iirc, of course!

Rick_S
Male, 40-49, Eastern US
 3157 Posts
Monday, June 16, 2014 7:54:46 PM
I remember learning in college that any sized object will produce the wave pattern in the double slit experiment. It's just that the size slit you need to cause the wave pattern is going to be several orders of magnitude smaller than the object if you go beyond the photon/electron type stuff.

I computed the size slit you would need to create the interference pattern with baseballs back then. I don't remember the result, but I do remember that it was very small, and that even the thread on the baseball couldn't pass through the slit.

OldOllie
Male, 60-69, Midwest US
 13002 Posts
Monday, June 16, 2014 2:50:10 PM
This means matter changes when observed by everything?

Yes. Observation at the quantum level is not passive. You cannot observe anything without interacting with it. You can only see an object in your everyday environment because photons are being scattered from it. At the quantum level, though, even a single photon will affect the state of the particle with which it interacts.

You cannot tell the exact position of, say, an electron, because (are you ready?) the electron doesn't HAVE an exact position until you interact with it. It's just a smeared-out wave (unless it's constrained by a potential such as being bound to an atom).

It's always dicey to make analogies with the macroscopic world, but imagine a thundercloud. It contains a quantity of electric charge, but where, exactly, is that charge located? It doesn't exist in one place, but when a lightning bolt from that cloud strikes a tree, for a short time you know exactly where it is.

OldOllie
Male, 60-69, Midwest US
 13002 Posts
Monday, June 16, 2014 1:32:12 PM
Electrons and other quanta simply do not exist as point particles; however, when they interact with other particles, as they must do in any observation or when the electron hits the wall, the wave function collapses, and they interact at a single point.

The wave function describes the probability of the particle interacting at a particular point.

DutchWeed
Male, 18-29, Europe
 92 Posts
Monday, June 16, 2014 12:13:00 PM
This "The act of observing absorbs a certain amount of energy from the object being observed, thus altering it's characteristics." and the explanation from the video freak me out.

This means matter changes when observed by everything? or just the things that understand it?

or did the measuring equipment change the outcome?

weird stuff for sure

HolyGod
Male, 30-39, Western US
 4832 Posts
Monday, June 16, 2014 11:28:28 AM
1 theory is that whenever an event happens all possible outcomes exist in their own separate dimensional timeline. Only after we observe it do we know what timeline we currently exist on.

Nickel2
Male, 50-59, Europe
 4331 Posts
Monday, June 16, 2014 10:22:24 AM
The act of observing absorbs a certain amount of energy from the object being observed, thus altering it's characteristics.

captkava
Male, 40-49, Europe
 257 Posts
Monday, June 16, 2014 10:06:38 AM
wave/particle duality for the win/loss!

(see what i did there?)

HolyGod
Male, 30-39, Western US
 4832 Posts
Monday, June 16, 2014 9:19:23 AM
Schrodinger's cat

ElectricEye
Male, 40-49, Eastern US
 429 Posts
Monday, June 16, 2014 7:17:00 AM
Link: Dr Quantum - Double Slit Experiment [Rate Link] - What the Bleep Do We Know!?


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