Dark matter and the speed of light

Discussion in 'Pseudoscience Archive' started by quantum_wave, Aug 19, 2008.

  1. quantum_wave Contemplating the "as yet" unknown Valued Senior Member

    Messages:
    6,677
    What would be the impact on astronomy and cosmology if the speed of light was a dependent variable and the independent variable was the energy density of dark matter?
     
    Last edited: Aug 19, 2008
  2. Google AdSense Guest Advertisement



    to hide all adverts.
  3. Gently Passing Registered Senior Member

    Messages:
    232
    I don't believe in Dark Matter, to me it's just a sign that we have made some seriously f'd up mistakes and we're trying to patch it up so Physicists don't lose their tenure and have to get a real job.

    Please Register or Log in to view the hidden image!

     
  4. Google AdSense Guest Advertisement



    to hide all adverts.
  5. Mr. Hamtastic whackawhackado! Registered Senior Member

    Messages:
    4,492
    I haven't been able to get a somewhat simple answer on"why" there needs to be dark matter and dark energy(through google). At least nothing I could comprehend. Could anyone give a comparison or something to make this a bit easier to wrap my brain around?
     
  6. Google AdSense Guest Advertisement



    to hide all adverts.
  7. quantum_wave Contemplating the "as yet" unknown Valued Senior Member

    Messages:
    6,677
  8. Reiku Banned Banned

    Messages:
    11,238
    I do believe in Dark Matter, but is variably differential to the properties that we assume.

    Of course, this is speculation. And at this time, any speculation to do with dark matter, are all invariant.
     
  9. quantum_wave Contemplating the "as yet" unknown Valued Senior Member

    Messages:
    6,677
    Elsewhere we talked about prior conditions from which matter emerges. When I describe dark matter I am talking about the kind of mass that has not completed the journey into the formation of particles that appear in the particle model of particle theory.

    Isn't it a simple prediction to come to, that where matter exists in great quantities, i.e. galaxies for example, that pre-stage mass would have taken shape and would have remained in gravitational association with galactic structure that consists of particles that we CAN detect?
     
  10. Reiku Banned Banned

    Messages:
    11,238
    I did however, pardon me, report on the detection of the Axion. It is now presumed we have a standard model + the dark matter candidate, the Axion particle.
     
  11. quantum_wave Contemplating the "as yet" unknown Valued Senior Member

    Messages:
    6,677
    Must we google things ourselves. Where is a good link? Do you know how to embed a link in a post. For example you can use [ url=] [/url]

    Like this. The Axion is a dark matter candidate.

    Personally I like the idea I use in my QWC thread, Mass *has* gravity where pre-particles form from the energy background

    Please Register or Log in to view the hidden image!

    before the fundamental particles. The formation of fundamental particles leave an unused population of these pre-particles that do exert and feel gravity and so they hang around massive structure like galaxies.
     
  12. Reiku Banned Banned

    Messages:
    11,238
    I'm sorry. In the rare moments, i do link. Again, i apologise. I just accept that peeps would know i wouldn't lie about it.
     
  13. Reiku Banned Banned

    Messages:
    11,238
    Again, i will say, that the Axion particle is a candidate. I assume this means dark matter cannot exist in a model including that very particle... ??
     
  14. Reiku Banned Banned

    Messages:
    11,238
    It may require other dark matter particles, otherwise. But it is undeniably a good turn for dark matter itself.
     
  15. quantum_wave Contemplating the "as yet" unknown Valued Senior Member

    Messages:
    6,677
    Thanks for mentioning the Axion. Now if you would, please explain what you mean here:

     
  16. Reiku Banned Banned

    Messages:
    11,238
    Hi,

    I say this, because there must be an existing set of particles alongside the Axion. This is a particle that can travel through solid objects.

    However, the appearance of this unique particle has not revived an absolute condition for dark matter itself. Thergo, and answering your question, the dark matter candidate, may not be an actual dark matter itself.
     
  17. kaneda Actual Cynic Registered Senior Member

    Messages:
    1,334
    The speed of light seems to be dependant on space itself.

    I think we need to decide on what DM is rather than trying to make it fit a wish list.
     
  18. quantum_wave Contemplating the "as yet" unknown Valued Senior Member

    Messages:
    6,677
    Maybe we should start with a definition of space itself.

    Some think of it as the "fabric of spacetime". To some space could be empty and is just a place where things happen. Most agree that space seems to be something other that an perfect void.

    I like to think of space as infinite and filled infinitely with energy density that is characterized by continual energy density fluctuations. There are no voids.

    In my view DM is a characteristic of energy density. The average universal energy density is high enough to produce energy density fluctuations that are capable of forming matter, and dark matter is that part of the energy background that has no charge and therefore doesn't stand out to be detected. It is a stage of prematter formation that exists where the energy density is above the equilibrium threshold but below the lower matter formation threshold.
     
  19. Reiku Banned Banned

    Messages:
    11,238
    It turns out however, there is really no such thing as ''empty spacetime.''
     
  20. Reiku Banned Banned

    Messages:
    11,238
    Even the smallest part of any spacetime unit, is filled with either a potential energy or is bubbling with a real physical energy.
     
  21. quantum_wave Contemplating the "as yet" unknown Valued Senior Member

    Messages:
    6,677
    I guess you are right since the volume of spacetime is implied to be zero at the instant of the big bang so everything was "potential" at that point. Correct me if you don't agree, but most BBT theorists will just say that it had volume after the first instant and will not say it was ever infinitely small and infinitely dense.
     
  22. quantum_wave Contemplating the "as yet" unknown Valued Senior Member

    Messages:
    6,677
    I stand uncorrected

    Please Register or Log in to view the hidden image!

    .

    But getting back to the original post, photons are said to be expanding spherical waves (see bottom of page 4) as evidenced by the out of phase interference patterns in two slit experiments.

    Wouldn't we have to say that the photon's spherical waves would be expanding at the speed of light? Please correct me if this is not a fair conclusion.
     
  23. MetaKron Registered Senior Member

    Messages:
    5,502
    A single photon has a definite wavelength according to Planck's equations. If it is interfered with its size and shape changes. I can't see a pair of slits producing an expanding wavefront from light unless they are very close together, are extremely narrow, or they bounce light inside of them and produce a fan of light. Draw the lines. Light from a single pinpoint source passing through two slits without scattering should not intersect itself to produce an interference pattern.
     

Share This Page