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Special Relativity Paradoxes

  1. Sep 10, 2010 #1
    The intention here is to discuss paradoxes in Special relativity in mainstream physics, any idea?
  2. jcsd
  3. Sep 10, 2010 #2


    Staff: Mentor

    Hi koorsh.shahd, welcome to PF.

    Please have a look at all of the many, many, many such threads in the relativity sub forum.
  4. Sep 10, 2010 #3
    https://www.physicsforums.com/tags.php?tag=paradox [Broken]
    Last edited by a moderator: May 4, 2017
  5. Sep 13, 2010 #4
    Thanks, very good, also it happens to be another paradox, which arguments that Lorentz Transformation would be violated for two slow moving observers that observe a fast moving lab system.
    Please check:
    http://www.scipub.org/fulltext/pi/pi1153-56.pdf [Broken]
    Last edited by a moderator: May 4, 2017
  6. Sep 13, 2010 #5


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    Gold Member

    This is from your paper,
    I'm sure you are aware that energy and momentum are not Lorentz invariant independently, and have taken this into account.
    Last edited by a moderator: May 4, 2017
  7. Sep 13, 2010 #6
    From the paper in post #5:

    I thought that since Einstein's relativity the best evidence so far is that the speed of light IS invarient whether emitted from a stationary or moving body...

    Note: That paper would benefit from editing to correct English usage.
    Last edited: Sep 13, 2010
  8. Sep 13, 2010 #7
    As regards: energy and momentum, imagine, different systems measure their own energy or mass with regards to their invariant mass, but other systems measure their energy increased relatively by ɣ for instance. In a moving system, the energy of the photon is also increased by same factor ɣ measured by a stationary system. So far so good as the energy is consistent with weather measured by the moving observer or stationary observer, so is the created pairs' masses. But considering the fact in above article this gets inconsistent for instance for the slow moving observers.

    As regards the other statement that speed of light is invariant in vacuum, so far there is no evidence that can prove the opposite but the speed of light is variant in for instance in different gases with different densities and is measurable, this means that absolute motion is detectable and not relative as Einstein thought.
  9. Sep 13, 2010 #8
    Sorry it was a miss spelling "weather" should be "whether"
  10. Sep 13, 2010 #9


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    Science Advisor

    No, this only allows you to detect motion relative to the gas, it doesn't pick out a preferred inertial reference frame. If you have one box of gas A and an identical box of gas B moving at high speed relative to A, and you send light through both boxes, observers at rest relative to each box of gas will get the same answer v1 when they measure the speed of light through their own box, and they will also both get the same answer v2 when they measure the speed of light through the other box.
    Last edited: Sep 13, 2010
  11. Sep 13, 2010 #10
    Looks like you are trying to promote your paper. From the abstract:

    The above is known to be incorrect. I thought this forum was closed to promoting and debating fringe theories, correct?
  12. Sep 13, 2010 #11
    I don't call it promoting a paper, in fact that we are discussing a paradox like any other paradoxes, please explain why incorrect?
  13. Sep 13, 2010 #12

    Doc Al

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    Staff: Mentor

    As starthaus explained, discussion of non-mainstream personal theories is not permitted. Please refer to the Physics Forums Global Guidelines, which are linked at the top of every page under “Rules”, for a full explanation of our rules; note especially the section on "Overly Speculative Posts".
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