Editing Variable speed of light (section)

=== Subsequent proposals ===

Variable speed of light models, including Dicke's, have been developed which agree with all known tests of general relativity.<ref>{{cite journal |author=Broekaert |first=J. |year=2008 |title=A Spatially-VSL Gravity Model with 1-PN Limit of GRT |journal=Foundations of Physics |volume=38 |issue=5 |pages=409–435 |arxiv=gr-qc/0405015 |bibcode=2008FoPh...38..409B |doi=10.1007/s10701-008-9210-8 |s2cid=8955243}}</ref>

Other models make a link to [[Dirac large numbers hypothesis]].<ref>{{cite journal |author=Unzicker |first=A. |year=2009 |title=A look at the abandoned contributions to cosmology of Dirac, Sciama, and Dicke |journal=Annalen der Physik |volume=521 |issue=1 |pages=57–70 |arxiv=0708.3518 |bibcode=2009AnP...521...57U |doi=10.1002/andp.200810335 |s2cid=11248780}}</ref>{{why|date=March 2017}}

Several hypotheses for varying speed of light, seemingly in contradiction to general relativity theory, have been published, including those of Giere and Tan (1986)<ref>{{cite journal |author=Giere |first1=A. C. |last2=Tan |first2=A. |year=1986 |title=A Derivation of Hubble |url=https://www.airitilibrary.com/Publication/alDetailedMesh?docid=05779073-198610-201303280001-201303280001-217-219 |journal=Chinese Journal of Physics |volume=24 |issue=3 |pages=217–219}}</ref> and Sanejouand (2009).<ref>{{cite journal|author=Sanejouand, Yves-Henri|title=Empirical evidences in favor of a varying-speed-of-light|year=2009|arxiv=0908.0249|doi=10.1209/0295-5075/88/59002|journal=Europhysics Letters |volume=88 |pages=59002|s2cid=121784053 }}</ref> In 2003, Magueijo gave a review of such hypotheses.<ref>{{cite journal|author=Magueijo, João|title=New varying speed of light theories|journal=Reports on Progress in Physics|volume=66|issue=11|year=2003|pages=2025–2068|doi=10.1088/0034-4885/66/11/R04|bibcode=2003RPPh...66.2025M|arxiv=astro-ph/0305457|s2cid=15716718}}</ref>

Cosmological models with varying speeds of light<ref>
{{cite journal |author=Barrow |first=J. D. |year=1998 |title=Cosmologies with varying light-speed |journal=Physical Review D |volume=59 |issue=4 |pages=043515 |arxiv=astro-ph/9811022 |bibcode=1999PhRvD..59d3515B |doi=10.1103/PhysRevD.59.043515 |s2cid=119374406}}</ref> have been proposed independently by Jean-Pierre Petit in 1988,<ref>
{{cite journal |author=Petit |first=Jean-Pierre |year=1988 |title=An interpretation of cosmological model with variable light velocity |url=http://www.januscosmologicalmodel.com/pdf/1988-ModPhysLettA-1.pdf |journal=Mod. Phys. Lett. A |volume=3 |issue=16 |pages=1527&ndash;1532 |bibcode=1988MPLA....3.1527P |citeseerx=10.1.1.692.9603 |doi=10.1142/S0217732388001823}}</ref> [[John Moffat (physicist)|John Moffat]] in 1992,<ref>
{{cite journal |author=Moffat |first=John |year=1993 |title=Superluminary Universe: A Possible Solution to the Initial Value Problem in Cosmology |journal=International Journal of Modern Physics D |volume=2 |issue=3 |pages=351&ndash;366 |arxiv=gr-qc/9211020 |bibcode=1993IJMPD...2..351M |doi=10.1142/S0218271893000246 |s2cid=17978194}}</ref> and the team of [[Andreas Albrecht (cosmologist)|Andreas Albrecht]] and [[João Magueijo]] in 1998<ref>{{cite journal |last1=Albrecht |first1=A. |last2=Magueijo |first2=J. |year=1999 |title=A time varying speed of light as a solution to cosmological puzzles |journal=Physical Review |volume=D59 |issue=4 |pages=043516 |arxiv=astro-ph/9811018 |bibcode=1999PhRvD..59d3516A |doi=10.1103/PhysRevD.59.043516 |s2cid=56138144}}</ref> to explain the [[horizon problem]] of [[physical cosmology|cosmology]] and propose an alternative to [[cosmic inflation]].