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Geek Culture / Quantum Physics cartoon on YouTube

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Jeku
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Posted: 14th Jun 2007 10:20
For those who are confused by the bizarro world of Quantum Physics, this cartoon explains a phenomenally strange experiment called the Double Slit Experiment. Those who have never heard of it, I guarantee it will blow your mind

http://www.youtube.com/watch?v=DfPeprQ7oGc

Anyone want to comment?

Cash Curtis II
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Posted: 14th Jun 2007 10:36 Edited at: 14th Jun 2007 10:37
That was cool. Especially when they began shooting single electrons through. I've always known that electrons act as waves and particles, but I didn't know a single electron could act as both. I thought it was more of a 'wave of particles' type thing.

My only heartache is that Dr Quantum was a 3D dork.


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Van B
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Posted: 14th Jun 2007 10:59
Ok someone a lot smarter and a lot more awake needs to explain how simply watching the experiment could change the outcome!


Good guy, Good guy, Wan...
Raven
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Posted: 14th Jun 2007 11:22
i think something interesting to note, is that for the original experiment they were using an electron microscope to observe how the electrons acted.

problem with this is an electron microscope is an active form of observation, as what it does.. is shoots out an electron of it's own to measure differences in the waveforms to detect an electron.

possibly a simple way of explaining what happens is when you billow smoke into a room to see a laser beam. it's a similar sort of thing happening.. only what baffled the scientists is why their smoke ment that the laser beam reverted into a focused state rather than in the split state it had become that the original results suggested it had.

the answer comes from quantum physics, in the base principal that objects can be in one or more states at any given time. with the current observation methods where-by they are active rather than passive, it means that we cannot physically record what is going on without destorying a key state that an object can take.

what I always found interesting about the experiment itself, was that it showed that atoms weren't always in the same state; in the same sense that molecules have 3 states (gas, liquid, solid)

the physical make-up of a molecule doesn't change between states, but certain molecules will one remain adheasive to each other; provided they remain in a given state due to different temperatures that they change state. This is quite interesting to note on it's own because from that we understand that molecules can only interact when they are in the same state on a fusion, fission basis.

with this we can theorise that the same is true at the atomic level, and that these atoms (we know of 3, Proton, Neutron and Electron) therefor also have similar states.. again educated guess is that they are Solid, Liquid or Gas. (i.e. Solid/Composite, Waveform/Photon, Energy/Neutrino)

as they can change state, this must mean that it can't be the lowest level of building blocks. Hense why we have a Sub-Atomic building block that was called a [/href]Quark, that build Protons and Neutrons .. plus Leptons which construct Electrons.

It's pretty interesting stuff though.
Something else that might really blow your noggins' is that through this experiment they discovered a new potencial state for particles to take.

Scientifically it's called a "Virtual Particle", but also is called a "Boson".. someone who doesn't know about this stuff might have a faint recognition to the word Boson; and with good reason if you follow the forum/news24 and watched the debate about if to turn on a new particle accelerator they've developed in europe.

Personally speaking, I think that current particle physics is off the mark a bit. It is basically all theory, rather than fact; and I firmly believe in a different theory regarding the sub-atomic physics model.

indi
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Posted: 14th Jun 2007 12:10
spiders, snakes, deadly stuff no problems.
quantum physics, scary!

Opposing force
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Posted: 14th Jun 2007 13:31 Edited at: 14th Jun 2007 13:32
Ah ha, I thought I recognised him from somewhere...


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Oolite
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Posted: 14th Jun 2007 13:46
I'm no quantum physicist nor do i have any idea about quantum physics but that was pretty damn cool.


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Drew Cameron
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Posted: 14th Jun 2007 17:06
Cool video,

I covered this briefly of this during Advanced Higher Physics. Dead interesting.

Mikey P
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Posted: 14th Jun 2007 17:18 Edited at: 14th Jun 2007 17:19
My brother tried to get me to read "In Search of Schrodinger's Cat" (Or whatever that book is called) but it was too over my head. This hit the spot perfectly, and was quite funky to watch.

On a sort of related note I saw "The teabag Expirement" in videos related to this one.. coincidentally I watched it yesterday and was inspired to go try it as I've always thought it would be cool. It didn't work

Van B
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Posted: 14th Jun 2007 17:20
Hehe, just watched the alcoholic master chief video - worth a watch.


Good guy, Good guy, Wan...
Jeku
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Posted: 14th Jun 2007 19:43
I also found it fascinating that if they shot electrons one-at-a-time through the double slit, it still made the wave-like pattern. This absolutely makes no sense, unless, like the videos suggests, the electron bounces off itself through time.

*head explodes*

Oolite
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Posted: 14th Jun 2007 19:51
it really is fascinating and i'm really eager to find out why.

So, does that mean if this electron can bounce off itself through time that time travel would be possible?


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Raven
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Posted: 14th Jun 2007 20:24
actually i think the video explains it in the most basic terms already what's happening, yet that scientists at the time didn't understand why.

what happens is that particles (like Electrons), can exist in more than one state. it's covered by Chaos Theory, where by a particle exists in all three states simultaneously.

the easiest way to explain this would be in programming terms.
as you know, data comes in 3 core types: Character, Integer, Floating-Point

this is typically stored in the memory as an 32-bit (4-byte) value in modern computers.

Now while the data is in the memory, it is entirely stateless; it can be all three types, yet it is physically none of them.

We can then cast this data to whatever we need it to. But in Quantum physics the actual data will change itself based on it's own interaction rules. So you can think of this as a smaller program like how .NET is like where-by depending on how you access the data, it will change it to what it "believes" is best for what you're trying to do.

As such when it is interacting within an atmosphere, it will be a Waveform. When you try to see it, then it changes to a Solid form. When it has no need to interact with other particles it is an Energy form.

Hopefully that helps makes this a little more clear, but I doubt it. This is quite a difficult subject to understand until you understand what's going on behind the scenes.

It's like trying to see what a Processor is doing, without knowing any of the OpCodes. You have access to the API, but you have no way to tell what is going on without Back-Engineering.

This is what scientists are currently attempting to do. Quantum Physics is really a giant Wiki that everyone keeps adding to while back-engineering so we know how to create a device interface.

Ack! I think that analogy might've just complicated it all again lol

Jeku
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Posted: 15th Jun 2007 02:20
Raven--- quantum physicists do not fully understand what's going on behind the scenes, so I'm pretty sure you don't either

LD52
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Posted: 15th Jun 2007 02:32
Matter has a mind of its own
Raven
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Posted: 15th Jun 2007 15:27
Quote: "Raven--- quantum physicists do not fully understand what's going on behind the scenes, so I'm pretty sure you don't either"


well given my degree and own interest is in quantum physics, while I'm fully aware that I cannot explain to you exactly how the universe works at this level; it doesn't mean that i'm unable to try to explain the current theory to everyone in a way they might understand.

I have my own theories on the subject itself, which to a degree I was able to prove in my thesis a few years back with a physical experiment. As I tried to explain in my last post, this entire subject is like trying to back-engineer hardware; like trying to create graphics drivers for a new OS. No one person knows what is actually going on, but through experimentation we expand what we can prove we believe is going on. Sometimes we're wrong, sometimes we're not. It's all a good learning experience.

I won't go into my theories on it all, because I doubt anyone here has either the equippment to confirm results I've had in the past .. or the knowledge on the subject to actually discuss it with me at a decent level.

It's like an Assembly programmer trying to explain what a program is doing to a DarkBASIC user. Without someone willing to learn, it would just be a waste of time, and quite a while before they are working at the same level.

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