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originally posted by: dragonridr
originally posted by: Nochzwei
originally posted by: Phage
a reply to: Nochzwei
No. Paper has three dimensions. I'm looking at a stack of it now. If a piece of paper had two dimensions there wouldn't be a stack.
Lol, I said for all practical purposes means a gross approximation. To be exact fold only the flat surface of your flat screen tv in the middle at right angles and you have 3d
No you wouldnt there is no 2 dimensional object any where else other than math. And if an object were 2 D it cant be made into a 3 D object because to do so there would have to be added dimensions making it no longer 2 D.
originally posted by: dragonridr
a reply to: Arbitrageur
My problem with his idea is energy is one thing but to say mass as well. We know energy can convert to mass but in empty space this isnt occurring. We could make the argument that virtual particles indeed contain mass for a fleating moment but the problem is if it ever created more mass than we currently have the Quantum fluctuations would tear the universe apart.
If he said mass, then I wouldn't agree with that either, since it's not an appropriate characterization for dark energy. But I'd have to hear exactly what he said in context to make a final judgement on whether I agree or disagree with him about that. Most of the stuff he said made sense to me until he got to the point where he said he was speculating and in those speculative areas I have no strong opinions like ImaFungi about him being right or wrong, but if his track record is as bad as he admits it is, then statistically speaking the chances of him being right are low (below 50% based on his own statements about his track record).
originally posted by: dragonridr
a reply to: Arbitrageur
My problem with his idea is energy is one thing but to say mass as well.
I'm not sure there is a smallest finite space. I can conceive of Planck length/2, the problem is that no such quantity can be measured because a photon energetic enough to measure it would collapse into a black hole.
originally posted by: ImaFungi
So now I would ask, and you can ask this too; How can there be a smallest finite 3d quantity of space?
So I don't see the benefit of trying to think about dimensions smaller than a Planck length, if I can't ever prove whether smaller dimensions do or don't exist. It might be a fun topic to discuss over a beer, but I don't see the practical or scientific value.
Simple dimensional analysis shows that the measurement of the position of physical objects with precision to the Planck length is problematic. Indeed, we will discuss the following thought experiment. Suppose we want to determine the position of an object using electromagnetic radiation, i.e., photons. The greater the energy of photons, the shorter their wavelength and the more accurate the measurement. If the photon has enough energy to measure objects the size of the Planck length, it would collapse into a black hole and the measurement would be impossible. Thus, the Planck length sets the fundamental limits on the accuracy of length measurement.
originally posted by: ImaFungi
originally posted by: dragonridr
a reply to: Arbitrageur
My problem with his idea is energy is one thing but to say mass as well. We know energy can convert to mass but in empty space this isnt occurring. We could make the argument that virtual particles indeed contain mass for a fleating moment but the problem is if it ever created more mass than we currently have the Quantum fluctuations would tear the universe apart.
Where do virtual particles come from? Are they fundamental, or are they the decay of other particles? Could what virtual particles decay into relate to dark energy or matter?
originally posted by: Arbitrageur
Planck Length
So I don't see the benefit of trying to think about dimensions smaller than a Planck length, if I can't ever prove whether smaller dimensions do or don't exist. It might be a fun topic to discuss over a beer, but I don't see the practical or scientific value.
Simple dimensional analysis shows that the measurement of the position of physical objects with precision to the Planck length is problematic. Indeed, we will discuss the following thought experiment. Suppose we want to determine the position of an object using electromagnetic radiation, i.e., photons. The greater the energy of photons, the shorter their wavelength and the more accurate the measurement. If the photon has enough energy to measure objects the size of the Planck length, it would collapse into a black hole and the measurement would be impossible. Thus, the Planck length sets the fundamental limits on the accuracy of length measurement.
originally posted by: dragonridr
originally posted by: ImaFungi
originally posted by: dragonridr
a reply to: Arbitrageur
My problem with his idea is energy is one thing but to say mass as well. We know energy can convert to mass but in empty space this isnt occurring. We could make the argument that virtual particles indeed contain mass for a fleating moment but the problem is if it ever created more mass than we currently have the Quantum fluctuations would tear the universe apart.
Where do virtual particles come from? Are they fundamental, or are they the decay of other particles? Could what virtual particles decay into relate to dark energy or matter?
That goes into Lambda baryons and scalar fields. This is a very complicated process in physics meaning you need a strong background. Ill give you an idea but you have to understand Feynman sums and the math involved. Ok hear is a start its a lecture by Hawking he will show you how a universe can be created without a violation of physics.
Ps this lecture leads to some interesting areas including the fact of how energy is created at an event horizon. Which can lead tosome interesting possibilities for black holes one being they could literally have no mass.
Yes. How does it collapse? It's a thought experiment. It's probably not possible to make such an energetic photon outside of something like big bang conditions, but the idea is simple, the more energy a photon has, the more gravitational attraction it has, and when the gravitational attraction becomes so great that light can't escape, it's a black hole. The math proof is given at the link.
originally posted by: ImaFungi
When they say 'it would collapse into a black hole'... do they mean the photon itself will?
originally posted by: Arbitrageur
Yes. How does it collapse? It's a thought experiment. It's probably not possible to make such an energetic photon outside of something like big bang conditions, but the idea is simple, the more energy a photon has, the more gravitational attraction it has, and when the gravitational attraction becomes so great that light can't escape, it's a black hole. The math proof is given at the link.
originally posted by: ImaFungi
When they say 'it would collapse into a black hole'... do they mean the photon itself will?
originally posted by: ImaFungi
a reply to: dragonridr
The energy(/matter/stuffness) of reality/universe has existed forever.
This means 'a beginning of the universe', is either a big crunch from the previous universe, the point of most crunch being the 'singularity'.
Or, a pocket in a multi verse. Which would still mean the multi verse, as reality, is stuff that has always existed, and this universe would be a result of the greater shifting of that, and so that would be its beginning (but it probably wouldnt look like everything that is the universe coming out of or inflating from a 1d point).
Or, there is a greater reality, and within it intelligent entities created the universe, and 'the singularity' in your equations, is the point at which they turned on their device.
originally posted by: ImaFungi
a reply to: dragonridr
You are wrong.
The reason you are wrong is because a wave function you are using an arbitrary plane, for example 'sea level', and then saying there is water +1 above sea level and there is water -1 below sea level, therefore there is no water!
originally posted by: ImaFungi
a reply to: dragonridr
Just dont say something can come from nothing...if thats not what you mean.
I think that might not be what you mean.
I think you mean to say, order can come from chaos.
I think you mean to say from a state of 100% entropy came 0.0000001% entropy
I think you mean to say, from an amount of regular sand just sitting there, can be made a sandcastle. Same amount of sand, just a different order.
I think thats what you mean. The same amount of energy existed, always, just in a different form.
All the energy didnt come from nothing. But you predict, that it didnt used to be so clumped up and organized as it is now.
Dont argue that energy came from nothing... Its wrong, its embaressing, I cant take you serious at all as an adult, or thinker, or teacher, or scientest, or baby, if you say everything came from nothing. Its wrong. If language and math is right, you and it are wrong. It is a bad statement. Dont say it. Say it. Say it a lot. I dont care, say it all the time, please, it just hurts you. God would not be impressed with your thinking.