• Corpus ID: 117949496

Measured redshift invariance of photon velocity

  title={Measured redshift invariance of photon velocity},
  author={J B Miller and Thomas E. Miller and Michael J. Hoffert and Larry A. Dingle and Robert Harwell and E. Hayes},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
We report the rst direct photon velocity measurements for extragalactic objects. A ber-optic, photon time-of-ight instrument, optimized for relatively dim sources (m 12), is used to measure the velocity of visible photons emanating from galaxies and quasars. Lightspeed is found to be 3:00 0:03 10 8 ms 1 , and is invariant, within experimental error, over the range of redshifts measured (0 z 1:33). This measurement provides additional validation of Einsteins theory of General Relativity (GR) and… 

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