Difference between revisions of "Lunar Laser Ranging Test of the Invariance of c"
(Imported from text file) |
(Imported from text file) |
||
| (One intermediate revision by the same user not shown) | |||
| Line 8: | Line 8: | ||
==Abstract== | ==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. | + | 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:Relativity]] | + | [[Category:Scientific Paper|lunar laser ranging test invariance c]] |
| + | |||
| + | [[Category:Relativity|lunar laser ranging test invariance c]] | ||
Latest revision as of 19:41, 1 January 2017
| Scientific Paper | |
|---|---|
| Title | Lunar Laser Ranging Test of the Invariance of c |
| Author(s) | Daniel Y Gezari |
| Keywords | {{{keywords}}} |
| Published | 2009 |
| Journal | None |
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.
