View source for Lunar Laser Ranging Test of the Invariance of c

{{Infobox paper
| title = Lunar Laser Ranging Test of the Invariance of c
| url = [https://web.archive.org/web/20210223194146/http://arxiv.org/ftp/arxiv/papers/0912/0912.3934.pdf Link to paper (Internet Archive)]
| author = [[Daniel Y Gezari]]
| keywords = invariance, speed of light, reference frame, earth
| published = 2009
}}

'''Read the full paper''' [https://web.archive.org/web/20210223194146/http://arxiv.org/ftp/arxiv/papers/0912/0912.3934.pdf here] ''(archived copy — the original link is no longer available)''

==Abstract==

The speed of laser light pulses launched from Earth and returned by a retro-reflector on  the Moon was calculated from precision round-trip time-of-flight measurements and  modeled distances. The measured speed of light (c) in the moving observer's rest frame  was found to exceed the canonical value c = 299,792,458 m/s by 200?10 m/s, just the  speed of the observatory along the line-of-sight due to the rotation of the Earth during  the measurements. This result is a first-order violation of local Lorentz invariance; the  speed of light seems to depend on the motion of the observer after all, as in classical wave  theory, which implies that a preferred reference frame exists for the propagation of light.  However, the present experiment cannot identify the physical system to which such a  preferred frame might be tied.

[[Category:Scientific Paper|lunar laser ranging test invariance c]]

[[Category:Relativity|lunar laser ranging test invariance c]]