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General relativity describes gravity as warping of the spacetime continuum. Quantum mechanically, it seems to be gravitons. And quantum mechanics is usually held to overrule general relativity...
It's a British term, don't go by the literal translation!
Thanks for your explanations. I'm reading (trying to read) the books of Anton Zeilinger (he's austrian too, so this is the nearest thing for me)
and I believe that I have a very basic "understanding" about quantum physics, or at least what it's all about and I've heard the term "virtual photon" from time to time, but there stops every understanding I have
I know that gravity is the weakest of the fundamental forces, but still it has (on the macroscopic level) the biggest effects. So if I think of a "force" transportet by any kind of particle, these "particles" should absolutely fill all of space because from the smallest atom to a mega black hole all matter should send out "gravitons", that's why I'm wondering why it's so impossible to find this beast, especially as it's effects are so clearly visible ...
I think I have to learn more about what a particle is or could be
This sounds for me much more understandable
Yeah, I did a summer school at IQOQI in Innsbruck earlier this summer -quantum information is my area - treasure the guys there, they are seriously skilled and have many interesting projects on the go!
Yeah, QED is tough stuff, as I'm finding out!
Indeed, but again, it does depend on the degree of interaction these particles will have. A few bajillion (it's a unit, sh'up...) neutrinos pass through you every second, space is full of them, and yet you have to really try hard to detect them. While the graviton is a massless boson, if it's virtual I don't think they have any meaningful capability to interact with instrumentation and be detectable as such.
Yeah, quantum field theories are an interesting avenue of research there - both in particle physics and solid state physics.
Glad it did, but I would definitely ask someone who knows more about GR, I've had surprisingly little education in it so far, which needs fixing (bit more of a quantum person myself....).
We don't 'see' anything, only their effects on EM waves.Do we really "see" the graviton? ... I think we only see it's effect.
True, and gravitons have only been inferred to exist because the theory that predicts them is oh-so right about everything else. It would be nice to have something more... concrete.Of course I understand that we'll possibly never be able to see the graviton, but quarks, which we also can't see, have been observerd and evidenced in accelerators.
Anyone read about the CRU getting hacked 5 days ago and the release of 72 emails (another source said 61) in an attempt to discredit the man-made part of global warming?
CRU hacked emails taint global warming researchers
How come cuts only hurt when you see them?
Never heard that one before. I guarantee you I have had cuts that hurt prior to seeing it.
Because your brain might not recognise that you've been injured, given the quantity of information you receive. When you look at it, your brain suddenly thinks "Gosh, we're bleeding from Sector 18-β! Focus our attention at that area!", and BOOM, you're feeling the pain.How come cuts only hurt when you see them?
"higher dimensions", "can't be found", "too small", "never seen one", "don't like to be seen", "bog-standard degree".The general idea is that it zips to higher dimensions where it can't be found. Or it's too small.
Yes: spacetime. It's a physical thing, though not in the sense of an actual member that holds our guts together.
Nah, just your bog-standard degree
Exactly, we can see the particle: gravity. When we feel the effects of gravity, we're effectively 'seeing' gravitons.
Then again, we know quarks exist, and we've never seen one alone. Some things just don't like to be seen!
I wouldn't be doing very will if you weren'tWow, I'm learning so much here.
What instrument does Patrick Moore play?
Nor do I care if you believe me. Your problem, not mine.
I didn't intimate a thing. The news did the intimation. You took it the way it was written. I put nothing into the facts of the stories, which were citing scientific research. That's the way YOU read them.
Again, I have no need for you to believe that the stories I read are, in fact, stories that I actually read. You wanna be lazy.? Not my business. I already did the work. Passed it on, and you had a conundrum. Then decided that I was the bringer of the information rather that the passer on.
I made no assertions. I merely posed three questions, which you rode like that guy rode the bomb down in Dr. Strangelove.
That's the best you got?
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