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Big Temprature
Hi what it says that the temperature when bigbang happened was 100 million trillion trillion degrees , but the temperature is caused my random movements and colliding of particles. if space it self was created by bigbang, there should not have been much space to accumulate all those particles that too created cause of BB, so my question is where does such a high temp came from, or energy what ever you call it . my second question is What triggered BB to happen, why was it so unstable in which ever form he was. |
#2
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Big Temprature
The big bang models start as initial conditions high temperatures simply because
the physics leads us to that conclusion if we follow the expansion backwards in time. And it does not address the cause of the initial expansion. For a summary of what it does say, you might pick up a good elementary-level textbook or visit Ned Wright's cosmology tutorial and FAQ: http://www.astro.ucla.edu/~wright/cosmolog.htm SomeOne wrote: Hi what it says that the temperature when bigbang happened was 100 million trillion trillion degrees , but the temperature is caused my random movements and colliding of particles. if space it self was created by bigbang, there should not have been much space to accumulate all those particles that too created cause of BB, so my question is where does such a high temp came from, or energy what ever you call it . my second question is What triggered BB to happen, why was it so unstable in which ever form he was. |
#3
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Big Temprature
SomeOne wrote:
Hi what it says that the temperature when bigbang happened was 100 million trillion trillion degrees , but the temperature is caused my random movements and colliding of particles. if space it self was created by bigbang, there should not have been much space to accumulate all those particles that too created cause of BB, so my question is where does such a high temp came from, or energy what ever you call it . A photon is a particle of light. Light has wavelength. The shorter the wavelength the more energetic the photon. When the universe was young it was very small and there wasn't any room for long wavelength photons so all the photons had to be extremely short wavelength and therefore extremely energetic. my second question is What triggered BB to happen, why was it so unstable in which ever form he was. Best answer so far is that nothing triggered it. Uncaused events occur all the time around us. They are very hard to see because of the uncertainty principle, but sometimes, as with the Casimir effect, they can be measured. However, the more energetic the event the less likely it is to happen. Events big enough for the big bang don't occur often enough for us to investigate them in detail easily. (like once in 1,400,000,000 years.) Another way to look at it is to compare the big bang with the north pole. At the north pole every direction is south, but nothing strange is going on; all the laws of physics work just the same as everywhere else. At the big bang, every direction is future, but again nothing strange is going on. If every direction is future then there isn't any past so nothing can trigger the BB. When the universe was really, *really* young those photons I mentioned were so energetic that their energy density was enough to fold space around themselves to create black holes, so that space is broken up into a sort of froth. It's at this point that scientists say that the laws of physics might be operating normally, but we don't know what those laws are. Keith Harwood. |
#4
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Big Temprature
"SomeOne" wrote in message ...
Hi what it says that the temperature when bigbang happened was 100 million trillion trillion degrees , but the temperature is caused my random movements and colliding of particles. if space it self was created by bigbang, there should not have been much space to accumulate all those particles that too created cause of BB, so my question is where does such a high temp came from, or energy what ever you call it . my second question is What triggered BB to happen, why was it so unstable in which ever form he was. Imagine all the matter in the universe distributed as a uniform gas. Now continue to shrink the size of the universe so that density and pressure will increase. Temperature will increase as well until it's one very dense and hot place. Now imagine all that in reverse and you've roughly got an idea of of post BB universe after a certain finite but very small amount of time. As far as what triggered the BB, who really knows? All we can say is that events can be extrapolated back to a very dense and very hot small universe in the far distant past. Before a certain epoch, however, we have very little to go on. Most of what is usually said regarding that time is subject to much speculation and educated guessing. |
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