Omega is NOT mass of matter versus mass of radiation, or mass of misbalanced matter versus all matter. What is called omega, is the following. If mass of the Universe is all we see, it will continue to expand forewer. If there were about 10 times more matter, the mass would be just enough to eventually slow down the expansion (so-called critical mass and devided by volume of Universe is called critical density). More mass would not only slow down but reverse the expansion. Anyway, the ratio of visible mass to the critical is what is called omega. Currently it is about 10-30% by various estimations (Omega = 0.1-0.3). And mass of radiation is included into omega, that is why scientists talk about possible "dark matter" out there.

And omega has nothing to do with misbalance between matter and antimatter in the early inflation era due to parity violation.

During evolution of BB almost all radiation was absorbed by matter, so we have very tiny fraction of Universe mass in light and in relic radiation (by the way, relic radiation is in fact visible light, but because it originated long ago, we see it from edges (or should we say, center) of Universe moving with speed extremely close to c away from us (or should we say, we are moving with almost c from that center). Red shift here is thus not few % but about mighty for orders ( 10^4), so the wavelength of that "relic flash" is blown by Doppler from visible submicron light to few millimeters, that is why we do not see it - it lost so much color (energy) that became radiowave. But any good radioscope sees it coming from afar in all directions.

light from stars is not coherent. Light from laser is.

• Re: Re: Re: Re: Re: Gravity doesn't exist? - yanniru - January 25, 2001 - 13:38 UTC
  • Coherency and other. - alexander - January 25, 2001 - 17:04 UTC
    • Re: Coherency and other. - yanniru - January 25, 2001 - 22:54 UTC
      • Re: Re: Coherency and other. - alexander - January 26, 2001 - 01:07 UTC
        • Re: Re: Re: Coherency and other. - yanniru - January 26, 2001 - 12:59 UTC
          • Re: Re: Re: Re: Coherency and other. - alexander - February 1, 2001 - 19:02 UTC