From Wikipedia, the free encyclopedia
Jump to: navigation, search
WikiProject Physics / Relativity  (Rated B-class, Mid-importance)
WikiProject icon This article is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
B-Class article B  This article has been rated as B-Class on the project's quality scale.
 Mid  This article has been rated as Mid-importance on the project's importance scale.
This article is supported by Relativity Taskforce.

This article has comments here.

Travel vs Communication[edit]

Am I the only one who feels that these subjects may better be served with separate articles? They really have a different set of problems and possible solutions. Kortoso (talk) 02:48, 12 December 2014 (UTC)

But they share the same causality paradoxes and logical impossibilities, if special relativity is correct.SBHarris 02:54, 12 December 2014 (UTC)

Variable Speed of Light is not a Theory...[edit]

Even the page states that is a HYPOTHESIS! Any kind of change to that section is creationist vandalism, as creationist are the only ones interested in trying to show that statement as "scientific theory" without scientific proof.--FaustoLG (talk) 03:43, 25 March 2015 (UTC)

The article does not say that variable speed of light is a theory. It says that variable speed of light is a postulate in some theories. Theories can be wrong. There is no need to call them hypotheses. Besides, hypotheses don't postulate. Theories do. I have reverted your edit. - DVdm (talk) 12:19, 25 March 2015 (UTC)
Note - I have reverted your personal attack here below. If you find a way to express yourself in a civil manner, feel free to do so. - DVdm (talk) 16:37, 26 March 2015 (UTC)

Variable speed of light section[edit]

In this edit, I've removed what looked to me like an unsupported editorial comment added in this 2006 edit to what is now the Variable speed of light section. The removed bit seemed somewhat disparaging.

I'm not a physicist, mathematician, or cosmologist, but it strikes me that this might be related to Inflation (cosmology). Digging around a bit, I found [1] and [2], which might be relevant. I can't claim to really understand this stuff so I'm not going to fiddle with this further. It does strike me, though, that there's a WP:SS disconnect between the content of this section and the Variable speed of light article which it links as {{main}}. Wtmitchell (talk) (earlier Boracay Bill) 05:56, 25 March 2015 (UTC)

Throughout the article it is not always clear which theories are generally accepted and verified and what are speculative, even if they are published in reliable sources. This is an important distinction that should be made in the article. Martin Hogbin (talk) 08:31, 25 March 2015 (UTC)

Phase Velocities above c section[edit]

This seems to be pervasive (accidental?)vandalism. The only reference given is to a book and is certainly a personal misinterpretation on the part of the author of this section. This section also refers to the "Phase Velocity" article on wikipedia which in turn cites the "material dispersion in optics" subsection of the Dispersion(optics) article as proof that phase velocity exceeds C in anomalous dispersion, however, the anomalous dispersion article clearly states that anomalous dispersion is a group velocity (multiple frequency) effect.

Any detection of phase velocities above c would be of earth-shattering significance in relativistic physics and the explanation given for how it does not violate relativity is nonsensical. If any phase velocity above c could be produced, modulation of its amplitude would be trivial and therefore information could be transmitted at speeds greater than C.

I believe this section should be deleted and the "phase velocity" article also needs to be repaired. I will institute these repairs in the near future if I receive no valid reason against this action. Nemesis75 (talk) 00:07, 1 April 2015 (UTC)