Comments on: Relativity: Measuring the speed of light http://skullsinthestars.com/2008/03/21/relativity-measuring-the-speed-of-light/ The intersection of physics, optics, history and pulp fiction Thu, 16 Feb 2012 16:44:24 +0000 hourly 1 http://wordpress.com/ By: Ep. 228: Giovanni Cassini | Astronomy Cast http://skullsinthestars.com/2008/03/21/relativity-measuring-the-speed-of-light/#comment-12921 Mon, 06 Feb 2012 17:33:53 +0000 http://skullsinthestars.wordpress.com/?p=267#comment-12921 [...] Speed of Light Mountaintop experiment – Skulls of Stars [...]

]]> By: Nuj http://skullsinthestars.com/2008/03/21/relativity-measuring-the-speed-of-light/#comment-11714 Sat, 10 Sep 2011 15:53:13 +0000 http://skullsinthestars.wordpress.com/?p=267#comment-11714 @G H Jadhav

]]> By: G H Jadhav http://skullsinthestars.com/2008/03/21/relativity-measuring-the-speed-of-light/#comment-4034 Sat, 18 Jul 2009 17:43:23 +0000 http://skullsinthestars.wordpress.com/?p=267#comment-4034 We are forced to beleive the speed of light is constant and is independent of the relative motion between source and observer. But we could not understand it. I have framed one experiment which will show the speed of light is not constant with repsect to different observers. To built the setup a sophisticated instrumentation centre (and experts) is required.

]]> By: Bruno http://skullsinthestars.com/2008/03/21/relativity-measuring-the-speed-of-light/#comment-3492 Sun, 26 Apr 2009 15:38:03 +0000 http://skullsinthestars.wordpress.com/?p=267#comment-3492 thanks for this great article!

]]> By: Vincent Isles http://skullsinthestars.com/2008/03/21/relativity-measuring-the-speed-of-light/#comment-2518 Thu, 06 Nov 2008 07:34:13 +0000 http://skullsinthestars.wordpress.com/?p=267#comment-2518 Very good discussion. Thanks!

]]> By: sunwukong http://skullsinthestars.com/2008/03/21/relativity-measuring-the-speed-of-light/#comment-1440 Thu, 22 May 2008 01:26:04 +0000 http://skullsinthestars.wordpress.com/?p=267#comment-1440 Gravity (not gravitational waves) is the fastest thing in the universe.
Light speed is dependant on source & target (e.g., dopler) as shown in 1676, before the internet and Einstein.

]]> By: skullsinthestars http://skullsinthestars.com/2008/03/21/relativity-measuring-the-speed-of-light/#comment-1372 Tue, 13 May 2008 14:02:29 +0000 http://skullsinthestars.wordpress.com/?p=267#comment-1372 Jeffrey: You’ll have to clarify what you’re asking; I’m not quite sure what you’re getting at. If you’re asking whether the results of a previous experiment which gave 189 kmiles/s is “wrong”, given what we know now, I would say not exactly: in physics all experimental results have a degree of uncertainty. 189 kmiles/s is accurate to two significant figures, i.e. the ’180′ part of the estimate is correct.

]]> By: Jeffrey Peter http://skullsinthestars.com/2008/03/21/relativity-measuring-the-speed-of-light/#comment-1367 Mon, 12 May 2008 03:35:20 +0000 http://skullsinthestars.wordpress.com/?p=267#comment-1367 I am curious; so can we say, 189,000 miles/sec is flawed?

]]> By: Uncle Al http://skullsinthestars.com/2008/03/21/relativity-measuring-the-speed-of-light/#comment-1008 Mon, 24 Mar 2008 16:09:09 +0000 http://skullsinthestars.wordpress.com/?p=267#comment-1008 One loophole remains. General Relativity and string theory assume isotropic vacuum and the Equivalence Principle (all local centers of mass vacuum free fall identically regardless of composition, hydrogen atoms to neutron stars). Teleparallel gravitation wholly contains GR without isotropic vacuum or the EP. GR might detectably fail in the massed sector (but not in massless electromagetism).

Do chemically identical left and right shoes fall identically? Teleparallel theory says “no.” Spacetime torsion (replacing curvature) transforms like the Lorentz force in EM – it is chiral, a left foot. Left and right shoes fit differently. They have divergent minimum action vacuum free fall trajectories.

An Eötvös balance tests the EP to 3×10^(-14) difference/average,

http://www.npl.washington.edu/eotwash/experiments/equivalencePrinciple/epWhat.html
http://www.npl.washington.edu/eotwash/publications/pdf/schlamminger08.pdf
Composition, Phys. Rev. Lett. 100 041101 (2008)
http://www.npl.washington.edu/eotwash/publications/pdf/prl97-021603.pdf
Polarized angular momenta, Phys. Rev. Lett. 97 021603 (2006)

Single crystal test masses of space group P3(1)21 alpha-quartz (right-handed crew axes) opposed by space group P3(2)21 alpha-quartz (left-handed crew axes) could deeply change physics. Somebody should look.

]]> By: skullsinthestars http://skullsinthestars.com/2008/03/21/relativity-measuring-the-speed-of-light/#comment-1003 Sun, 23 Mar 2008 23:34:26 +0000 http://skullsinthestars.wordpress.com/?p=267#comment-1003 Uncle Al: Thanks for the link; very nice! In my desire to cover only those experiments which led up to Einstein, I neglected to mention that the M-M experiment has been repeated numerous times with increasing resolution. I mentioned the most controversial of these, the work of Dayton Miller, in a much earlier post.

]]>