So wait, your telling me that if we can find a proper application for this technology we can create infinite amounts of energy without friction issues and heavy labor?!
I would say as a fellow Stargate fan you should join the Escapist Stargate Fan club but its been pretty dead since Universe was cancelled.CardinalPiggles said:My mind = Blown.
Also, does this mean Hover cars are indeed possible???
God damn it, I want to watch that now.thelonewolf266 said:As Jack O'Neill would say "Magnets!".
The thing with that is that it's completely wrong. This has never been done in any high school worth the name. No one would let a vat of liquid nitrogen loose near a group of teenagers, it's a recipe for disaster.Shadowfacet said:What I want to know is why this is a big deal to everybody? This technology has bee around for decades and it's one of the most basic demonstrations that you see in high school physics.
PLEASE Don't presume to think I am wrong. I am NOT talking merely about magnetic repulsion. And having just finished high school here in australia and from my own experience I can tell you that yes. We did do this experiment. Yes they did trust us to be responsible enough with liquid nitrogen. And it is most definitely what we did.Agayek said:The thing with that is that it's completely wrong. This has never been done in any high school worth the name. No one would let a vat of liquid nitrogen loose near a group of teenagers, it's a recipe for disaster.Shadowfacet said:What I want to know is why this is a big deal to everybody? This technology has bee around for decades and it's one of the most basic demonstrations that you see in high school physics.
Also, this uses fundamentally different principles than magnetic repulsion, which is what you are referring to. Magnetic repulsion relies on the property of magnets that two magnets of the same polarity will repel each other with a certain amount of force. If one of the magnets weighs less than the other, they will repel each other and the one higher up will float in the air.
This experiment uses a property of superconductors that has absolutely nothing to do with magnetic repulsion. Without a charge running through them, superconductors aren't even magnetic. In layman's terms, superconductors don't like to move through magnetic fields. If you try to push one through a magnetic field, they push back to try and not move. It's really complicated, but the gist of it is that moving around a magnet makes it try to move in the opposite direction.
If the magnetic field is strong enough and/or the push is weak enough, then the superconductor is able to create enough counter force to stop its motion. That's how it is suspended in the air. Gravity is not able to exert enough force to override the counter force.
It moves around circular magnets because of the shape of magnetic fields. The layman's version of that is that because the magnet is a ring, it's moving along the magnetic field instead of through it.
Wow, Australia must have damn good high schools. We've never touched anything like this. But according to this site, it's not the Meisner effect.Shadowfacet said:PLEASE Don't presume to think I am wrong. I am NOT talking merely about magnetic repulsion. And having just finished high school here in australia and from my own experience I can tell you that yes. We did do this experiment. Yes they did trust us to be responsible enough with liquid nitrogen. And it is most definitely what we did.Agayek said:The thing with that is that it's completely wrong. This has never been done in any high school worth the name. No one would let a vat of liquid nitrogen loose near a group of teenagers, it's a recipe for disaster.Shadowfacet said:What I want to know is why this is a big deal to everybody? This technology has bee around for decades and it's one of the most basic demonstrations that you see in high school physics.
Also, this uses fundamentally different principles than magnetic repulsion, which is what you are referring to. Magnetic repulsion relies on the property of magnets that two magnets of the same polarity will repel each other with a certain amount of force. If one of the magnets weighs less than the other, they will repel each other and the one higher up will float in the air.
This experiment uses a property of superconductors that has absolutely nothing to do with magnetic repulsion. Without a charge running through them, superconductors aren't even magnetic. In layman's terms, superconductors don't like to move through magnetic fields. If you try to push one through a magnetic field, they push back to try and not move. It's really complicated, but the gist of it is that moving around a magnet makes it try to move in the opposite direction.
If the magnetic field is strong enough and/or the push is weak enough, then the superconductor is able to create enough counter force to stop its motion. That's how it is suspended in the air. Gravity is not able to exert enough force to override the counter force.
It moves around circular magnets because of the shape of magnetic fields. The layman's version of that is that because the magnet is a ring, it's moving along the magnetic field instead of through it.
I can tell you all about the quantum theories for superconductivity and how when cooled below the critical temperature cooper pairs form between electrons travelling in the crystal lattice and because of the increased forces distort the mentioned lattice allowing them to movie with minimal resistance.
And please don't lecture me in laymans terms. If you want to tell me do it properly. Not that you need to. The reason they levitate is due to the Meisner effect which basically says that because the electrons can move in the lattice without resistance, and the fact that when a conductor moves in an external field a loop of current known as an eddy current will be generated in this to resist the direction of movement, As their is no resistance this eddy current creates a field to directly oppose the external field.
Please next time check before assuming that I'm talking out my arse.
Magnets!Twilight_guy said:My question: If the thing is negative 185 Celsius how does he avoid burning his fingers when he touches it?
well Magnets have things called magnectic fields... Oh its a meme *sigh*dragongit said:... Fucking magnets. How do they work!?
When did High Schools start to teach quantum physics?Shadowfacet said:PLEASE Don't presume to think I am wrong. I am NOT talking merely about magnetic repulsion. And having just finished high school here in australia and from my own experience I can tell you that yes. We did do this experiment. Yes they did trust us to be responsible enough with liquid nitrogen. And it is most definitely what we did.Agayek said:snip
I can tell you all about the quantum theories for superconductivity and how when cooled below the critical temperature cooper pairs form between electrons travelling in the crystal lattice and because of the increased forces distort the mentioned lattice allowing them to movie with minimal resistance.
And please don't lecture me in laymans terms. If you want to tell me do it properly. Not that you need to. The reason they levitate is due to the Meisner effect which basically says that because the electrons can move in the lattice without resistance, and the fact that when a conductor moves in an external field a loop of current known as an eddy current will be generated in this to resist the direction of movement, As their is no resistance this eddy current creates a field to directly oppose the external field.
Please next time check before assuming that I'm talking out my arse.
No. Quantum mechanics was devised after a large number of macroscopic measurements failed to correspond with classical theories. It has since been verified in numerous other macroscopic measurements.Giest4life said:Is it possible this is the first visible demonstration of quantum physics? I mean, after all, quantum physics is a tad too small for the human eye.
LN2 is actually relatively easy to get hold of. And I'm pretty sure the human body is not a superconductor (especially not at temperatures higher than LN2 temperature).honestdiscussioner said:Would this work on thing other than liquid nitrogen? That's not exactly the simplest thing to get a hold of, so why did they use it? I'm only saying this because, if you could do this on a person, there are many applications, such as beds, or even prisons for overly dangerous felons.
I know it isn't "difficult", but you do have to go out of your way. It's not like people use liquid nitrogen for demonstrations unless the properties of the liquid nitrogen are required, so that means it was likely a necessity that they use it here.Lukeje said:LN2 is actually relatively easy to get hold of. And I'm pretty sure the human body is not a superconductor (especially not at temperatures higher than LN2 temperature).honestdiscussioner said:Would this work on thing other than liquid nitrogen? That's not exactly the simplest thing to get a hold of, so why did they use it? I'm only saying this because, if you could do this on a person, there are many applications, such as beds, or even prisons for overly dangerous felons.
Anyway; isn't this just the Meissner effect? It's been known for rather a while now...
Yeah in year 11 and 12 we cover basic quantum physics. On top of this we also learn about the history and construction of the standard model of particle physics. I must say for all the high prices of everything here I am glad I live in australia.bakan said:When did High Schools start to teach quantum physics?Shadowfacet said:PLEASE Don't presume to think I am wrong. I am NOT talking merely about magnetic repulsion. And having just finished high school here in australia and from my own experience I can tell you that yes. We did do this experiment. Yes they did trust us to be responsible enough with liquid nitrogen. And it is most definitely what we did.Agayek said:snip
I can tell you all about the quantum theories for superconductivity and how when cooled below the critical temperature cooper pairs form between electrons travelling in the crystal lattice and because of the increased forces distort the mentioned lattice allowing them to movie with minimal resistance.
And please don't lecture me in laymans terms. If you want to tell me do it properly. Not that you need to. The reason they levitate is due to the Meisner effect which basically says that because the electrons can move in the lattice without resistance, and the fact that when a conductor moves in an external field a loop of current known as an eddy current will be generated in this to resist the direction of movement, As their is no resistance this eddy current creates a field to directly oppose the external field.
Please next time check before assuming that I'm talking out my arse.
If you do bachelor and master courses about it, you are busy for 2+ semesters and that's when you actually make it on your first try...
Btw in this case it isn't the Meissner effect, it is a form of quantum trapping as it isn't the magnet levitating but the superconductor itself.
And yeah, looks as though whilst it's not the Meisner effect it still relies upon many of the principles that I mentioned. Yeah, the "flux tubes" that are mentioned are just a characteristic of type II superconductors that allow minuscule penetrations of magnetic flux through the wafer.BlackWidower said:Wow, Australia must have damn good high schools. We've never touched anything like this. But according to this site, it's not the Meisner effect.
http://io9.com/5850729/quantum-locking-will-blow-your-mind--but-how-does-it-work
It's similar, but not the same. The magnetic field doesn't go around the superconductor, it goes through it. So it's like a nail, holding it in place. There's no resistance, it's just held in place like...like a nail.