Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2000-06-28
Int.J.Mod.Phys. D10 (2001) 41-48
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
8 pages, RevTeX, "Honorable Mention" in the Annual Essay Competition of the Gravity Research Foundation for the year 2000, to
Scientific paper
By exploring the relationship between the propagation of electromagnetic waves in a gravitational field and the light propagation in a refractive medium, it is shown that, in the presence of a positive cosmological constant, the velocity of light will be smaller than its special relativity value. Then, restricting again to the domain of validity of geometrical optics, the same result is obtained in the context of wave optics. It is argued that this phenomenon and the anisotropy in the velocity of light in a gravitational field are produced by the same mechanism.
Esposito Miguel W. R.
Pereira J. G.
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