a little quantum for you
 

http://video.google.com/videoplay?do...4618&q=quantum

they leave some information out as to why things happen, but as a 5min summation of a fairly complex phenomena its pretty good :)

Re: a little quantum for you
 

Quantum is way cooler if you look at the math:

http://www.scheides.com/misc/physics...m/quantum.html

Re: a little quantum for you
 

you should have said, "If you understand the math".

Re: a little quantum for you
 

I don't understand. How can it act as both and change only when it's being watched? Are they hinting that electrons are living matter? WTF?

Re: a little quantum for you
 

the math is what makes it lame to me. i took modern physics as well, and i loved doing the thought experiments. but then when we had to start deriving wave functions and crap, that just took all the fun out of it for me :(

rst95eclipse, they left out a little detail just to make it more interesting for the layman. it involves the uncertainty principle which interpreted in one way says simply "if you can detect something, you are disturbing it."

kind of like a blind guy, to know where things are he has to feel them, and by touching them he's moving them slightly. same holds true for quanta (light packets) and other subatomic particles. you can't detect them without bouncing something off of them, and when you do that you're changing its velocity (speed and direction)

Re: a little quantum for you
 

When you learn the mathematics, you really understand the "how and why" just like with anything else in life. Some people are the same way about cars, you ride in a stock dsm, and then you ride in something heavily modified, and you really start to wonder what happened inbetween. When I tell people about my car, I tell them about my FMIC, my bigger injectors, how a maf-t works, and the 20g I have on it...in the end, most people only hear 'bigger turbo' but we all know there's really more to the equation...

Re: a little quantum for you
 

dang, how's that 20G? pretty powerful?

Re: a little quantum for you
 

my point exactly.

Re: a little quantum for you
 

I've done a little experimenting with some matter and slits my self :D I've found additional slits do confuse things. :rolleyes:

About the video: I don't get it.

Re: a little quantum for you
 

Oh so true. But I see a front mount, I know what's up.

So basically you need to bounce something like a radar beam in order to see it, therefore it interrupts it? It's confusing because they have a freakin eye there, which shouldn't distrupt anything in the experiment because it's an eye, just that simple for me.

Re: a little quantum for you
 

its like trying to "detect" a basketball by throwing baseballs towards it in the dark. if you do hit it, you'd hear it go "thunk", but by that time the basketball has already moved from where the baseball hit it.

you just changed the basketballs velocity by striking it.

so if you're always going to be one step behind in this manner, how sure can you ever be that an electron is where you think it is?

you can't. thats the uncertainty principle.

and thats pretty much what all of quantum mechanics is, probabilities and statistics. nothing is ever definite, and nothing is ever impossible.


the eye doesnt project anything, its only a reciever. in this example it recieves baseballs and interprets them as vision :)

Re: a little quantum for you
 

Nice example. I gets it now. It's kind of messed up how electrons can act like a "knuckleball" and move however they want, esp when shot out of a high-velocity cannon.