Authors: Christian M. Wackler
The question whether light moves with constant or variable velocity is indubitably of the utmost importance. Preliminary reflections concerning the nature of that movement contrast the hypotheses of propagation and emission. As a brief historical examination reveals, alleged evidences in favour of the invariance postulate turn out to be erroneous or inconclusive and supposedly decisive tests methodologically invalid. An emission theory based on Michael Faraday's idea of ray vibrations is shown to be in accordance with observation. The question whether the speed of light depends on the velocity of its source has thus not been settled experimentally since only a kinematic test, to date never conducted, can give an unambiguous answer. Juxtaposed to seemingly similar but defective designs Wilhelm Wien put forward in 1904, such an experiment, amending a set-up suggested by Herbert Dingle, is proposed.
Comments: 8 Pages.
[v1] 2018-05-18 04:51:36
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