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Which comes first matter or energy?

  1. Sep 22, 2012 #1
    Hey there guys, i had an argument with my office mate during a lunch about "Which comes first -the energy or matter?" Maybe it pop out because im having crab omelet (egg) while he has (chicken) salad.. but anyway it was unsettled and i would appreciate any help. Im sure he is on net searching as i write this, but i think i have advantage using the forum. Thanks
  2. jcsd
  3. Sep 22, 2012 #2


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    In the earliest times of the universe, all was energy. Matter came later.
  4. Sep 22, 2012 #3
    Yeah! as i thought.. but what about this they saying in BBT ; "a pointlike thing with infinite mass/density?"
  5. Sep 22, 2012 #4


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    Sounds like television physics to me, disconnected from reality.
  6. Sep 22, 2012 #5
    Right..Youtube as i recall it. Thanks!

    ..By the way, How can i describe "all was energy" ? what kind of energy? Momentum? Heat? Photon?
    Last edited: Sep 22, 2012
  7. Sep 22, 2012 #6

    If you say all was energy? than you have to mean the only form of energy that we don't define as matter and that is light... I don't know if this guy has some sources on this. But it is generally not known how the universe was at the very beginning because relativity+quantum mechanics=unknown. Both theories don't work with each other and both describe the same universe... therefore they are both incorrect, so... we don't really know in what form energy was at the complete beginning, but shortly after it was probably mostly light but how it turned into matter I am not sure on, there are some specialists that can probably tell you what is going on there.
  8. Sep 22, 2012 #7


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    Energy is always a property of something. There's no such thing as "pure energy", unless you don't consider photons to be "something."
  9. Sep 22, 2012 #8


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    I mis-spoke. I should have said RADIATION, not energy. There WAS matter, it just wasn't clumpled into anything (like atoms or molecules) and was just elementary particles moving at unbelievable speeds. Weinberg estimates that the "temperature" at 1/100th of a second after the singularity was 10E11 degrees and the universe was fillled with electrons, positrons, neutrinos, and photons (I may have left some out).

    It's because there are no atoms that I always think of the early uinverse as devoid of matter, but that clearly is not quite the right way to think about it.
    Last edited: Sep 22, 2012
  10. Sep 22, 2012 #9
    So you say they came at the same time?
  11. Sep 22, 2012 #10
    Every matter has energy as its property. Not all energy have matter property.
  12. Sep 23, 2012 #11
    Einstein said photon is particle of energy..and 2 photons collision creates mass particle + anti-mass particle...so far Energy of Light wins 5-0 or with a draw
  13. Sep 23, 2012 #12
    Haha so we can say...

    "in the beginning, there was light."
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