Professor Brian Cox A Night With The Stars Part3of4

[jamesthegreat16]

james blunt... what are you doin here ?..:O

[RJL738]

Proofe of the compellingness of science and the fact that studied far enough the world is far too weird for common sense is the fact that atoms are mostly empty space, they fuction in waves, they even occupy only certain energies and somehow this is how they attach together, it's amazing to think that at small enough distances the everyday world is made of this.

[LoverofLiszt]

@RJL738 Watching too much of this really makes one disrespectful to religious people saying "god did it".

[lanunselat]

@LoverofLiszt that's because in your mind, god is bearded old man who play harp up on top of the clouds

[LoverofLiszt]

@lanunselat No, in my mind is god a delusion of an answer for the invalid question Why.

[lanunselat]

@LoverofLiszt By saying God does not create the universe and the universe created itself is like saying a carpenter didn't build a house. but it's a hammer, a chisel and a saw that build it.

[LoverofLiszt]

@lanunselat A house is created by an intelligent designer, man. There is no reason to set the criteria that a designer have to be designed first. By using the god argument you explain nothing, but merely transfer the question; who/what created god? Who/what created that? Who/what cre... etc.

God is an unnecessary step in the search for the "absolute beginning" witch raises many questions yet answers none.

[themanatthezoo]

That may be so! But, which came first? The chicken or the egg?

[stuartquark]

Is it correct at 7.55 that all electrons in universe shift according to Pauli exclusion principle? My understanding is that it works within individual atoms and if not how many energy levels are there for them to utilise around an atom so that every electron in the UNIVERSE can be in a different state!?

[md2perpe]

@stuartquark It is true that all electrons in the whole of universe have to be in different states. I don't think that Brian Cox is correct about all electrons having to adjust when heating one diamond, though.

[66261e34]

@md2perpe Prof. Cox actually replied to a post on Physicsforums about this lecture. This is not the traditional way that the exclusion principle is taught, but it is correct. However, I still think the way he presents it is a little misleading. Due to the fact that the wave function extends everywhere, there is some connection between all electrons. However, the effect of that diamond on a distant star's electrons is similar to the effect of the diamond's gravity on the star... negligible.

[md2perpe]

@66261e34 Yes, I've read that thread and his explanations. But what does this say? The calculations for the double well only shows that there are two "ground states", with somewhat different energies. Nothing there says what happens when energy is added to the system.

[HQDnB]

and they say they cant make warp engine ! -__-' 

[MattHunX]

"I'm going to encourage a chemical reaction...from over here!" Love how he says it. LOL

[valarmanwe]

"When I heat this diamond up, all the electrons across the Universe instantly...." Something doesn`t add up here. If that is true, then light speed has been exceeded by an all but infinite degree, has it not ? Let`s assume it takes light ( which is still reckoned to be the fastest speed possible ) 15 000 Million yrs to cross the Universe. Now he`s telling us that there is an immediate affect on the other side of this Universe to him rubbing the diamond.

What am I not understanding ?

Thanks.

[66261e34]

@valarmanwe The conclusion you have drawn is correct despite the fact that what he said isn't quite correct. Information can't be transferred faster than light, but through entanglement weird things can happen. He is being a little insincere by saying that heating the diamond will change electrons light years away. The exclusion principle doesn't apply because the electrons that far away are in a different quantum state. Its too bad. There are some true and crazy things out there.

[valarmanwe]

@66261e34 What is `entanglement ?`

[66tomm99]

@valarmanwe You have pointed out the one thing Brian Cox got wrong, however for reasons other than what you said. Pauli's Exclusion principle only applies for atoms within an atom. However due to Quantum Entanglement something on one side of the universe can affect something on the other side of the universe immediately. BUT that does not contradict the speed of light, because it is impossible for INFORMATION to be sent in this way. Wikipedia quantum entanglement to find out more.

[66tomm99]

@66tomm99 Actually, forget the first bit. After some research it seems that what Brian Cox said about electrons changing their energy state was true. That's the beauty of physics, you can learn something new (and and freaking wierd) every day.

[valarmanwe]

@66tomm99 Thanks,pal. I will look up the sitation you mention, but I`m not a scientist and so fear it may be beyond me. Information I understand to an extent ( in terms of time and entropy ). But quantum entanglement sounds a bit daunting. I don`t suppose it has got anything to do with the universe being "bent ?" Probably not. I can feel my brain hurting already !

[66tomm99]

@valarmanwe It's not too hard of a concept, the maths will be near impossible but still! Also try simple wiki to get a simple overview.

[valarmanwe]

@valarmanwe Pps. I Looked at Quantum Entanglement. I`m going to carry on with the day job. Happy Christmas.

[valarmanwe]

@66tomm99 ps. `citation !" Sorry - I`ve had a beer or two.

[md2perpe]

@66tomm99 "atoms within an atom"? Do you mean "electrons within an atom"? Anyway you're wrong. Pauli's exclusion principle applies to all electrons in all of universe. But by just belonging to different atoms (separated with some space), two electrons have almost perpendicular states.

[66tomm99]

@md2perpe Yes, a simple mistake. I think you have misunderstood what I said, in the sense that I thought it needed only apply to electrons in seperate systems and not all electrons at once. And judging by your comment to stuartquark you thought similar. If you look through the comments I admitted that actually Brian Cox is right and that every electron in the universe does have to shift. Space is, apparently, not enough to differentiate them (as we both thought).

[md2perpe]

@66tomm99 The Pauli exclusion principle does actually apply to all electrons in universe at once. But I do not believe that every electron in the universe has to shift. Rather, I believe that the system will only accept such amounts of energy that the electron will excite to a non-occupied state.

[tetranoob]

@valarmanwe thats a very good point. I have also been wondering about the speed of gravity...

[aeolus75]

He should had invited Jeremy Clarkson, And let Jeremy have the pleasure to light up the hydrogen :)))