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Do Gravitational Waves Travel at the Speed of Light?



 
 
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  #1  
Old December 8th 17, 09:38 AM posted to sci.astro
Pentcho Valev
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Default Do Gravitational Waves Travel at the Speed of Light?

Einstein's general relativity said nothing about the speed of gravitational waves - it was Eddington who discovered, in 1922, that some of them travel at the speed of light:

Arthur Eddington 1922: "The problem of the propagation of disturbances of the gravitational field was investigated by Einstein in 1916, and again in 1918. It has usually been inferred from his discussion that a change in the distribution of matter produces gravitational effects which are propagated with the speed of light; but I think that Einstein really left the question of the speed of propagation rather indefinite. His analysis shows how the co-ordinates must be chosen if it is desired to represent the gravitational potentials as propagated with the speed of light; but there is nothing to indicate that the speed of light appears in the problem, except as the result of this arbitrary choice. [...] Weyl has classified plane gravitational waves into three types, viz.: (1) longitudinal-longitudinal; (2)longitudinal-transverse; (3) transverse-transverse. The present investigation leads to the conclusion that transverse-transverse waves are propagated with the speed of light in all systems of co-ordinates. Waves of the first and second types have no fixed velocity - a result which rouses suspicion as to their objective existence." http://rspa.royalsocietypublishing.o...6/268.full.pdf

Was Eddington's discovery correct? Why do Einsteinians teach that "gravitational waves travel at the speed of light" is a prediction of Einstein's general relativity and don't mention the true discoverer - Eddington?

Pentcho Valev
  #2  
Old December 8th 17, 06:15 PM posted to sci.astro
Pentcho Valev
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Default Do Gravitational Waves Travel at the Speed of Light?

Even if gravitational waves existed (they don't), LIGO's neutron-star result (GW170817) would still be a fake unless:

(A) in 1922 Arthur Eddington correctly predicted that gravitational waves travel at the speed of light (Einstein's general relativity had said nothing about the speed of gravitational waves).

(B) the gravitational waves experience a delay equal to the Shapiro delay experienced by light.

Given the fact that Eddington was a serial fraudster, I don't think there is any hope for LIGO conspirators.

Pentcho Valev
  #3  
Old December 8th 17, 07:51 PM posted to sci.astro
Pentcho Valev
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Default Do Gravitational Waves Travel at the Speed of Light?

The idiocies produced by Einsteinians are immeasurably more monumental than those produced by Flat Earthers:

"In relativity, there is a 'speed of information' - the maximum speed that you can send information from one point to another," says University of Wisconsin-Milwaukee physicist Jolien Creighton, an expert on general relativity and member of the LIGO team that first spotted gravitational waves. Creighton explains that in electromagnetism, when you shake an electron, it creates a change in the electric field that spreads out at the speed of light. Gravity works the same way. Shake a mass and the change in the gravitational field - the gravitational wave - propagates at that same speed. "So the fact that the speed of gravitational waves is equal to the speed of electromagnetic waves is simply because they both travel at the speed of information," Creighton says." http://blogs.discovermagazine.com/d-.../#.WirbWFWWbIU

Pentcho Valev
  #4  
Old December 9th 17, 09:00 AM posted to sci.astro
Pentcho Valev
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Default Do Gravitational Waves Travel at the Speed of Light?

LIGO's gravitational waves are ripples in spacetime which doesn't exist:

Nima Arkani-Hamed (06:09): "Almost all of us believe that space-time doesn't really exist, space-time is doomed and has to be replaced by some more primitive building blocks." https://www.youtube.com/watch?v=U47kyV4TMnE

Nobel Laureate David Gross observed, "Everyone in string theory is convinced...that spacetime is doomed. But we don't know what it's replaced by." https://www.edge.org/response-detail/26563

What scientific idea is ready for retirement? Steve Giddings: "Spacetime. Physics has always been regarded as playing out on an underlying stage of space and time. Special relativity joined these into spacetime... [...] The apparent need to retire classical spacetime as a fundamental concept is profound..." https://www.edge.org/response-detail/25477

http://negrjp.fotoblog.uol.com.br/im...0819051851.jpg

Pentcho Valev
  #5  
Old December 10th 17, 09:58 AM posted to sci.astro
Pentcho Valev
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Default Do Gravitational Waves Travel at the Speed of Light?

"But a matter of far greater concern is the conduct of the mainstream physics establishment worldwide. A gigantic fraud was committed right in their midst and in their name, and not a single voice of dissent or criticism or even concern arose. They are in full solidarity with the fraudsters." https://dreamheron.wordpress.com/201...ave-you-world/

That is normal - we all live in the post-truth world. There WERE mainstream critics but they are now unpersons:

"Withers, however, was already an unperson. He did not exist : he had never existed." https://ebooks.adelaide.edu.au/o/orw...hapter1.4.html

"Einstein believed in neither gravitational waves nor black holes. [...] Dr Natalia Kiriushcheva, a theoretical and computational physicist at the University of Western Ontario (UWO), Canada, says that while it was Einstein who initiated the gravitational waves theory in a paper in June 1916, it was an addendum to his theory of general relativity and by 1936, he had concluded that such things did not exist. Furthermore - as a paper published by Einstein in the Annals of Mathematics in October, 1939 made clear, he also rejected the possibility of black holes. [...] On September 16, 2010, a false signal - a so-called "blind injection" - was fed into both the Ligo and Virgo systems as part of an exercise to "test ... detection capabilities". At the time, the vast majority of the hundreds of scientists working on the equipment had no idea that they were being fed a dummy signal. The truth was not revealed until March the following year, by which time several papers about the supposed sensational discovery of gravitational waves were poised for publication. "While the scientists were disappointed that the discovery was not real, the success of the analysis was a compelling demonstration of the collaboration's readiness to detect gravitational waves," Ligo reported at the time. But take a look at the visualisation of the faked signal, says Dr Kiriushcheva, and compare it to the image apparently showing the collision of the twin black holes, seen on the second page of the recently-published discovery paper. "They look very, very similar," she says. "It means that they knew exactly what they wanted to get and this is suspicious for us: when you know what you want to get from science, usually you can get it." The apparent similarity is more curious because the faked event purported to show not a collision between two black holes, but the gravitational waves created by a neutron star spiralling into a black hole. The signals appear so similar, in fact, that Dr Kiriushcheva questions whether the "true" signal might actually have been an echo of the fake, "stored in the computer system from when they turned off the equipment five years before"." http://www.thenational.ae/arts-life/...s-collide#full

Natalia Kiriushcheva: "What is shown on this picture? The equation on this page is what will be left from Einstein's equations of General Relativity (GR) after linearization. i.e. after a certain assumption is imposed: the gravitational field is considered weak (is it a correct assumption for two black holes?). Moreover, this equation is similar to the wave equation of the Maxwell theory that (after some additional manipulations) describes propagation of electromagnetic waves in the absence of sources (absence of any source, including a system of two black holes!). Einstein pointed out in this paper that its result is not general, it is valid only under assumption that the gravitational field is weak and only linear coordinate transformations (a linearized version of the general coordinate transformations of GR) can be applied to these (linearized) equations. Einstein also did not predict in this paper "that two celestial bodies in orbit will generate invisible ripples in spacetime that experts call gravitational waves", as BI claims. He was talking about "the system" that radiates energy, without specifying what kind of system it is." https://gravityattraction.wordpress....s-involvement/

James Creswell, Sebastian von Hausegger, Andrew D. Jackson, Hao Liu, Pavel Naselsky, June 27, 2017: "As a member of the LIGO collaboration, Ian Harry states that he "tried to reproduce the results quoted in 'On the time lags of the LIGO signals'", but that he "[could] not reproduce the correlations claimed in section 3". Subsequent discussions with Ian Harry have revealed that this failure was due to several errors in his code. After necessary corrections were made, his script reproduces our results. His published version was subsequently updated. [...] It would appear that the 7 ms time delay associated with the GW150914 signal is also an intrinsic property of the noise. The purpose in having two independent detectors is precisely to ensure that, after sufficient cleaning, the only genuine correlations between them will be due to gravitational wave effects. The results presented here suggest this level of cleaning has not yet been obtained and that the identification of the GW events needs to be re-evaluated with a more careful consideration of noise properties." http://www.nbi.ku.dk/gravitational-w...nal-waves.html

James Creswell, Sebastian von Hausegger, Andrew D. Jackson, Hao Liu, Pavel Naselsky, August 21, 2017: "In view of unsubstantiated claims of errors in our calculations, we appreciated the opportunity to go through our respective codes together - line by line when necessary - until agreement was reached. This check did not lead to revisions in the results of calculations reported in versions 1 and 2 of arXiv:1706.04191 or in the version of our paper published in JCAP. It did result in changes to the codes used by our visitors [LIGO conspirators]. [...] In light of the above, our view should be clear: We believe that LIGO has not yet attained acceptable standards of data cleaning. Since we regard proof of suitable cleaning as a mandatory prerequisite for any meaningful comparison with specific astrophysical models of GW events, we continue to regard LIGO's claims of GW discovery as interesting but premature." http://www.nbi.ku.dk/gravitational-w...-comment2.html

Pentcho Valev
 




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