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Faster than speed of light possible ?

  1. Apr 10, 2014 #1
    good day ,

    I am not a professional , but I read that in according to laws of physics it is not possible to go faster than speed of light . but I also read that after the big bang in just seconds the universe expanded from a size of an atom to the size of a galaxy . so obviously it expanded faster than speed of light to reach such expansion rates . how can physics describe this ??
     
  2. jcsd
  3. Apr 10, 2014 #2

    ChrisVer

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    in case of the "big bang" the expansion did not involve matter but the spacetime itself...
     
  4. Apr 10, 2014 #3

    Wes Tausend

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    I'm also very much an amateur, but I think the most rapid part of the expansion, called Inflation, took place in far less than a few seconds but a trillionth of a trillionth of a second.

    The key is that the normal universe maintains the maximum speed of light at c in a vacuum. But if the fabric of space, therefore the "room" in space, inflates, theoretically there may be an appearance of faster-than-light speeds having taken place.

    We may find that we have added an epicycle to achieve cover for this phenomena, but I believe it is the best we have now. The theory is far from concrete, I think.

    Here's an outside link, and I would encourage you to look for FAQs in the Cosmology section of this site.

    Wes
    ...
     
  5. Apr 10, 2014 #4
    Thats interesting .. thx i will look at the link
     
  6. Apr 10, 2014 #5

    bcrowell

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    We have a FAQ about this: https://www.physicsforums.com/showthread.php?t=508610 [Broken]
     
    Last edited by a moderator: May 6, 2017
  7. Apr 10, 2014 #6

    Wes Tausend

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    Thanks for the quick link, bcrowell.

    I'm starting to learn to wisely look for FAQs here first, but my better half was literally dragging me out the door to a Supper when I answered, so I quick punted. Usually when in Rome, it pays to speak the same language and the FAQs are a real gift to make physics more clear to all concerned. So thanks for providing/contributing the onboard FAQ too.

    Wes
    ...
     
    Last edited by a moderator: May 6, 2017
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