World Lines & (x, y, z, t)

Discussion in 'Physics & Math' started by Dinosaur, May 4, 2014.

  1. brucep Valued Senior Member

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    That sums it up. You're spanking him with the analogy he loves so much. Farsight the creationist theologian. LOL.
     
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  3. brucep Valued Senior Member

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    Good questions. I'm going with yes for the space we'll be occupying tomorrow. Though that's probably wrong but I can't figure out why. The other two I'm going with no.
     
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  5. paddoboy Valued Senior Member

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    Time exists...if it did not exist, neither would space.....if space and time did not exist, neither would anything else.
    The Universe evolved space and time [now called space/time] and everything depends on those two realities...
    Philosophical claptrap aside.
     
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  7. paddoboy Valued Senior Member

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    :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
    Lee Smolin on the nature of time

    Lee Smolin – author of the new book Time Reborn – thinks that time is real. In fact, as he tells Margaret Harris in this podcast, he believes that time is so real that everything – even the supposedly timeless laws of physics – is subject to it

    see....
    http://physicsworld.com/cws/article/multimedia/2013/sep/23/lee-smolin-on-the-nature-of-time
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    Similar in many ways to Sean Carroll's explanation on the reality of time.
     
  8. Motor Daddy Valued Senior Member

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    Space is infinite 3 dimensional distance (infinite volume). How could that not exist? How could space possibly NOT exist? Space is inevitable, there is no alternative to space.
     
  9. Write4U Valued Senior Member

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    world
    I am sure I am missing something , but how can you describe motions of atoms as part of "world lines" (time)) and come to the conclusion that "there is no motion" in the spacetime continuum.

    I always thought that change (motion) was causal to the time part of spacetime. I admit, I base this on David Bohm's hypothesis of a "holomovement"

     
  10. Write4U Valued Senior Member

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    questions:
    a) did space exist before the BB?
    b) could space exist without time?
    c) is spacetime "infinite"?
     
  11. Motor Daddy Valued Senior Member

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    Yes, the infinite volume of space is inevitable. Like I said, there is no alternative to space. How could space not exist? Space is not created or destroyed, it just is!

    Space is volume. Time is duration. They are both inevitable. There is no alternative to either. We are trapped in space and time!

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    Space is infinite volume. There is infinite time in the past and future, but we use time to measure from point to point, and that's finite!
     
  12. paddoboy Valued Senior Member

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    Space and time as we know them, evolved from the BB.
    WMAP has shown the Universe/space/time to be overall flat....which does indicate the Universe is infinite.
    But I don't believe we can be sure of that.
     
  13. Motor Daddy Valued Senior Member

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    Space did not evolve. Space is volume, and there is nothing to volume other than 3 dimensional distance. There's nothing to distance except 1 dimensional space. Light is the standard.
     
  14. paddoboy Valued Senior Member

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    Space did evolve, along with time.
    They evolved at the instant we call the BB.
    The Universe space/time is expanding from that point....
    The CMBR is the relic heat from that period.....
    The abundance of hydrogen and some Helium, show how matter evolved from energy and the decoupling of the Superforce.
    That is the standard cosmological picture which is well supported at this time and has no peer.
     
  15. Motor Daddy Valued Senior Member

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    That point that you say space evolved from...that point is a point in space. Space did not evolve, the contents of space evolved. Space is infinite volume, irrespective of the contents.
     
  16. paddoboy Valued Senior Member

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    When we say the Universe/space/time evolved at the BB, we do not mean it evolved from a point in space.
    The BB happened everywhere at the same time, since everywhere was what evolved from the BB...in other words space and time.
    The BB did not start in space. It was the evolution of space.....and time.
    Our understandings and explanations as to what happened, cease at t=10-43 seconds...or the first Planck instant.
    Any further back then that is sheer speculation.
     
  17. Write4U Valued Senior Member

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    I like exploration of alternative theories about space and time, but from what I heard, Smolin's arguments are vague, confused and completely unpersuasive.
    Ms Harris also seemed to have her doubts.

    The whole thing reminds me of the Carlin's 'Hippy Dippy Weatherman"
     
  18. quantum_wave Contemplating the "as yet" unknown Valued Senior Member

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    I thought I might speak up here. MD, you are of course singing my song. Space is infinite and has always existed unless you believe in a beginning of space and time. That statement is hard to disagree with, but I'm sure someone will, but the point is about "nothingness".

    I have been asking those who believe in a beginning to tell me their view on it, i.e. is it "something from nothing"? What's with that? How could you define "nothingness" in such a way that something could come from it?
     
  19. Motor Daddy Valued Senior Member

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    Speculate all you want, your speculations can't remove space or time, they are inevitable. You measure the time from the BB all you want to, that in no way affects any other object's measured duration in space. There were objects in space long before the BB. Mass evolves to space!
     
  20. brucep Valued Senior Member

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    Eternal Inflation [all inflation theories] predict that our universe is a component of a multiverse of inflating universe. The inflation events are Eternal into the future while the origin of the multiverse is hidden [behind an event horizon] in the past. So inflation theory predicts a future and a past where inflation events occur. The standard model of cosmology predicts the [cosmological] distance between non gravitationally bound systems is expanding.
    The experimental results from WMAP predict our universe had a beginning but is infinite in extent. Spatially flat.
     
  21. Write4U Valued Senior Member

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    I don't look at it as a "point IN space". Before the BB there was no space, there was only a point (singularity) from which our "reality of spacetime" originated.
     
  22. Motor Daddy Valued Senior Member

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    Space is not an object, it is VOLUME!
     
  23. quantum_wave Contemplating the "as yet" unknown Valued Senior Member

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    I wanted to ask you, did the point in space come from nothing? Or do you just say we can't know because, after all, it was a singularity?
     

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