Discussion in 'Physics & Math' started by hansda, Mar 19, 2013.
I meant exactly what I meant.
Log in or Sign up to hide all adverts.
"So, through Newtonian method also perihelion precession can be calculated. Except planet Mercury, for all other planets his calculations are almost correct."
You agree with this?
....but the result comes out incorrect, different from measurement
Incorrect, all perihelion advances calculated in Newtonian mechanics are incorrect. I understand that you are a staunch relativity denier but you need to learn how to face reality.
May be Newtonian calculations are not very correct, because he did not consider the frame-dragging effect.
Nothing to do with frame-dragging.
Frame-dragging is part of GR only.
...but frame dragging has nothing to do with the discrepancy between Newtonian prediction and GR prediction for the advancement of the perihelion.
Do you mean the Sun does not cause any "frame-dragging" effect?
Did you understand the sentence:
...but frame dragging has nothing to do with the discrepancy between Newtonian prediction and GR prediction for the advancement of the perihelion?
So, this discrepancy is due to what?
Rindler, pages 242-243. It is time you stopped playing games.
Can you give a online link for this reference.
No, you need to spend the money and buy the book. Or take a class.
Do you know, why perihelion precession happens? Due to attractive force or repulsive force(consider the Sun at the centre of the orbit)?
there is no such thing as repulsive force, you have been told this repeatedly, you need to stop trolling.
He's not trolling, he's just really, really thick. Please Register or Log in to view the hidden image!
Please Register or Log in to view the hidden image!
Markus - you have been logging in several times each day since my #770 query, so what exactly is the problem in not extending the minimal courtesy of responding? Till now expected better of you than to (non)react with an evident snub. Whatever - have become used to that kind of thing here.
Continuing in monologue mode, I find it confusing and strange that a schizophrenic response to 'gravity does/doesn't gravitate' abounds amongst GR trained folks near a century after GR was finalized as a theory, and that after a 10-year gestation period. As a Google search reveals. So what is the truth? Best I can tell, the 'pro gravitates' camp simply appeals directly to the non-linearity of the EFE's. Now it's well known that in EM a non-linear medium (say dielectric) will give rise to a bulk charge density whenever a field is imposed - hence a source density arises. But evidently it's more subtle in GR, and this piece seems to convincingly argue 'nay gravitates' is right:
(note the 'yes' position there is related to speculative quantum gravity corrections approaching Planck energy levels - thus wholly irrelevant to classical GR discussion)
My own admittedly lay thoughts are that it seems 'gravity does NOT gravitate' was actually built in to GR from the outset via the Ricci flat postulate, as discussed in preamble leading up to equation (1) here:
That sure looks to me like about as clear as it gets in saying that a gravitational field is not it's own source in GR - as a foundational principle. Yet amazingly the same author goes on later to declare " it implies gravitational energy gravitates just as does every other form of energy." in referring to the ET (LHS of EFE's). Where 'hand-wavy' enters and leaves in all this is maybe anyone's guess. I realize this can slide into 'pseudo-tensor' territory, but any takers?
Nice hearty chunks of text. Hard to digest though.
Separate names with a comma.