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A tensor equation that is valid in any coordinate system is valid in every coordinate system.

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05-18-2019 10:12 AM
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  1. Chrissy52
    Chrissy52 liked post by KJW On thread : Helium balloon deflated in hot truck
    I was thinking the elevated temperature would cause the stretched rubber to become softer and more porous, especially to the rather small helium atoms.
    Liked On: 06-26-2017, 02:02 PM
  2. Jilan
    Jilan liked post by KJW On thread : How does matter bend space time?
    By presuming that matter actually causes spacetime to bend, you are assuming that matter and bent spacetime are distinct entities. An alternative perspective is to consider that the bent spacetime...
    Liked On: 09-28-2014, 05:19 PM
  3. Jilan
    Jilan liked post by KJW On thread : Delayed Choice Quantum Eraser
    The way I understand entanglement is to consider entire spacetimes in superposition. Each spacetime of the superposition is consistent in terms of the correlations of the particles that are...
    Liked On: 09-19-2014, 09:12 PM
  4. plurabelle
    plurabelle liked post by KJW On thread : Delayed Choice Quantum Eraser
    The way I understand entanglement is to consider entire spacetimes in superposition. Each spacetime of the superposition is consistent in terms of the correlations of the particles that are...
    Liked On: 09-19-2014, 12:48 PM
  5. plurabelle
    plurabelle liked post by KJW On thread : Delayed Choice Quantum Eraser
    MODERATOR NOTICE: I've merged the two threads pertaining to the delayed choice quantum eraser (http://en.wikipedia.org/wiki/delayed_choice_quantum_eraser) into this one. Please confine discussion of...
    Liked On: 09-19-2014, 10:35 AM
  6. Jilan
    Jilan liked post by KJW On thread : NExt: Through a key hole....?
    Let's assume that all motion (velocity and acceleration) is parallel to the surface of the mirror (so that I don't have to keep repeating this). Also, in case it is not clear, the motion of the wall...
    Liked On: 09-14-2014, 12:59 PM
  7. tk421
    tk421 liked post by KJW On thread : How do we know that black holes form?
    Also, we must admit every possible coordinate system.
    Liked On: 09-11-2014, 06:43 PM
  8. Gerry Nightingale
    Gerry Nightingale liked post by KJW On thread : What will I see if the mirror will move very fast?
    It's true and it can be proven quite simply. I already provided enough information to piece together a proof. But let's be clear about this. It is sufficient that for a pulse of light reflecting off...
    Liked On: 09-05-2014, 05:33 AM
  9. Gerry Nightingale
    Gerry Nightingale liked post by KJW On thread : What will I see if the mirror will move very fast?
    I'll put it another way. I regarded the websites you recommended as a red herring. This is incorrect. The motion of the mirror is parallel to its surface. Thus, the reflection plane is the...
    Liked On: 09-04-2014, 04:49 AM
  10. Gerry Nightingale
    Gerry Nightingale liked post by KJW On thread : What will I see if the mirror will move very fast?
    There is no transverse Doppler effect in this case. It is a mirror that is simply reflecting the light from the observer back to the observer. It is not emitting its own light. The light from the...
    Liked On: 09-02-2014, 02:48 PM
  11. chaimc
    chaimc liked post by KJW On thread : What will I see if the mirror will move very fast?
    I interpret the opening post as the mirror moving transverse to the line of sight, in which case Jilan's approach and answer are correct.
    Liked On: 09-02-2014, 05:42 AM
  12. Gerry Nightingale
    Gerry Nightingale liked post by KJW On thread : What will I see if the mirror will move very fast?
    I interpret the opening post as the mirror moving transverse to the line of sight, in which case Jilan's approach and answer are correct.
    Liked On: 09-02-2014, 05:22 AM
  13. Jilan
    Jilan liked post by KJW On thread : What will I see if the mirror will move very fast?
    I interpret the opening post as the mirror moving transverse to the line of sight, in which case Jilan's approach and answer are correct.
    Liked On: 09-02-2014, 05:18 AM
  14. x0x
    x0x liked post by KJW On thread : SPLIT : Farsight's Comments
    I didn't mention non-inertial motion. Also, my point is that we are not talking about light specifically, but rather about speeds and velocities in general. I should also remark that c is the...
    Liked On: 09-01-2014, 02:01 PM
  15. Gerry Nightingale
    Gerry Nightingale liked post by KJW On thread : My universal theory
    This reasoning is flawed. You are attempting to use the law that energy cannot be created nor destroyed to distinguish between a finite and infinite universe. Even if there is only a finite amount of...
    Liked On: 08-30-2014, 08:51 PM
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