 1  Author
 S. J. Prokhovnik  Requires cookie*   Title
 The General Solutions of the RobertsonWalker Nullgeodesic and their Implications    Abstract
 The RobertsonWalker metric gives mathematical expression to three widelyheld assumptions about the nature of the observable universe. It is shown that the nullgeodesic of this metric has littleknown solutions for the speed and distance of a lightsignal relative to its source. Some implications of these results are considered, the most interesting of these being that only in a universe whose 3space is Euclidean (k = 0) will the behaviour of light on the cosmological scale be compatible with .our understanding of light behaviour on the local scale. It is shown in an Appendix that the derived implications of the metric are entirely consistent with Special Relativity, its underlying principles and its consequences.   
Reference
 Z. Naturforsch. 48a, 915—924 (1993); received December 3 1992   
Published
 1993   
Keywords
 Cosmology, Special Relativity, Light propagation   
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