XPost: sci.physics, sci.physics.particle, sci.physics.relativity   
   From: vitalmis@optusnet.com.au   
      
   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.   
      
   --- SoupGate-Win32 v1.05   
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