Light Created from a Vacuum , page 2


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reply posted on 18-11-2011 @ 03:55 PM by CLPrime
reply to post by FOXMULDER147



There is no such thing as a true vacuum. By definition, it's a quantum vacuum - the lowest quantum state of a system. Within the quantum vacuum, it's the Heisenberg Uncertainty Principle that allows virtual particles to pop in and out of existence.

Your semantics are out-dated.


reply posted on 18-11-2011 @ 03:58 PM by FOXMULDER147
Originally posted by Biigs
reply to
post by FOXMULDER147



i think the piont is that there is not such thing as a true vaccuum

Actually there is, but only for an impossibly small period of time. The particles fluctuate in and out of it.


reply posted on 18-11-2011 @ 04:00 PM by FOXMULDER147
reply to post by CLPrime


Well then they should use the term "quantum vacuum". I was literally correct.



reply posted on 18-11-2011 @ 04:04 PM by CLPrime
reply to post by FOXMULDER147



In modern physics, there is no difference between a "vacuum" and a "quantum vacuum." We're dealing with quantum mechanics. It's like saying "tuna fish."


reply posted on 18-11-2011 @ 04:07 PM by seaez
Originally posted by charles1952
I don't know how significant this part of the article is:
What happens during the experiment is that the "mirror" transfers some of its kinetic energy to virtual photons, which helps them to materialise. According to quantum mechanics, there are many different types of virtual particles in vacuum, as mentioned earlier. Göran Johansson, Associate Professor of Theoretical Physics, explains that the reason why photons appear in the experiment is that they lack mass.

"Relatively little energy is therefore required in order to excite them out of their virtual state. In principle, one could also create other particles from vacuum, such as electrons or protons, but that would require a lot more energy."


That seems as though the experimenters are putting energy into the vacuum, and depending on how much they put in, they could get any kind of particle to come out. Doesn't that mean that they aren't getting energy from nothing and the system is not an energy vacuum?

Please feel free to point out my obvious mistakes, as I know nothing about the sciences.



It's a vacuum, so by common definition nothing within: energy or matter. For their experiment they are not inputting energy into the vacuum, they are creating an object within the vacuum, similar to a space shuttle traveling through space... it all depends on how big a vacuum you are referring too. Where that object is, is no longer considered vacuum, so they simulate a mirror traveling at light speed that vibrates at a certain frequency with that energy controlled and accounted for... then poof! Their mirror reflects a virtual photon, in a pair. Currently the energy used to create their mirror is much more than the photon, but if we can find different more energy economical mirrors.... Poof of concept


reply posted on 18-11-2011 @ 04:08 PM by FOXMULDER147
reply to post by CLPrime


OK, ok. It's not a major issue. You seem to be something of a physics boffin. I like your posts. While we've got you here can you explain in simple terms Hawking's idea that the universe "popped into existence"...? It's somewhat related to this thread, in a way...

Edit: I mean, the idea that the universe "created itself".. I can't grasp it.

edit on 18-11-2011 by FOXMULDER147 because: (no reason given)
edit on 18-11-2011 by FOXMULDER147 because: (no reason given)



reply posted on 18-11-2011 @ 04:21 PM by CLPrime
reply to post by FOXMULDER147



I stopped following Hawking after A Brief History of Time (which was actually written the year I was born). His statement -- "Because there is a law such as gravity, the Universe can and will create itself from nothing. Spontaneous creation is the reason there is something rather than nothing, why the Universe exists, why we exist." -- is confusing, because I'm not sure what the existence of the law of gravity has to do with universal self-creation. I do know, though, that Hawking is using the Heisenberg Uncertainty Principle as a basis for his belief. Heisenberg Uncertainty says that virtual particles can, and do, appear spontaneously in an otherwise empty space. As I've already mentioned, it's also the basis for what's described in this thread.

I think he's using a sort of reductio ad absurdum - virtual particles in the universe we observe appear spontaneously, so it must be possible that the universe, itself, appeared spontaneously.


reply posted on 18-11-2011 @ 04:21 PM by Char-Lee
reply to post by Maxmars


Wonder if this relates to the theory that our world and all we know is a 3 dimensional projection from a two dimensional wall around our universe. Again it looks like we are living in a controlled created environment.

Could ghosts then be like the particles people waiting for the energy to become as real as we may be.


reply posted on 18-11-2011 @ 04:29 PM by soficrow
reply to post by Maxmars



Amazing. Finally. I knew it.

S&F&



PS. Did you know prions are suspected of doing that appear-disappear act? ...Wonder where all those little tiny things go when they're not "here"?





reply posted on 18-11-2011 @ 04:43 PM by FOXMULDER147
reply to post by CLPrime


I see. Still, he's talking about events that happened after the Planck era. I thought he was talking about true creation.

So "the universe created itself" isn't true, as the universe must already have been existing to have allowed the events he described to have happened.

Any definition of 'creatio ex nihilo' is always a Catch-22


reply posted on 18-11-2011 @ 04:48 PM by CLPrime
reply to post by FOXMULDER147



Yep...the physical laws he is using to explain the existence of the universe were created with the universe and, so, can't be used to explain its existence.

Unless, of course, he is assuming the existence of a larger universe, with the exact same laws as ours, in which our universe formed as a result of those laws.

Personally, I prefer the theory that the universe "began" as an infinite quantum vacuum. Basically, this vacuum spontaneously collapsed, releasing a vast amount of energy, which then condensed to form matter...and the rest, as they say, is history. So, in that case, the universe is, and has always been, flat and infinite.


reply posted on 18-11-2011 @ 05:40 PM by Fractured.Facade
reply to post by Maxmars



If particles are continuously "fluctuating in and out of existence"

When they are not in existence, where are they?




reply posted on 18-11-2011 @ 05:47 PM by tkwasny
Originally posted by Fractured.Facade
reply to
post by Maxmars



If particles are continuously "fluctuating in and out of existence"

When they are not in existence, where are they?


Space and time are the foundational "materials" out from which imbalances are represented as particles or energy.
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