Light propagation in a curved-space Friedmann universe.

Details Light propagation in a curved-space Friedmann universe. Light propagation in a curved-space Friedmann universe.

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994znata..49..543p&link_type=abstract

Z. Naturforsch., A, Vol. 49, No. 4-5, p. 543 - 546

Physics

Universe: Light Propagation, Friedmann Universe: Relativity Theory, Friedmann Universe: Cosmology

Scientific paper

It is shown that, in a Friedmann universe considered as an expanding ensemble of fundamental particles and whose 3-space is Euclidean, the propagation of light and its associated wavelength(s) partake in the expansion of the universe. In consequence, a light-signal emitted from any source will reach and pass every fundamental particle in its path at the same speed, c, despite the systematic mutual recession of any pair of such particles. This result, derived from the Robertson-Walker metric, is in full accord with all local physical experience of light transmission and with the requirements of Einstein's Special Theory of Relativity. It is shown here that the same result also applies to any curved-space Friedmann universe.

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