Miscellaneous Articles Mostly Related to the
Experimental Foundations of Relativity

My purpose in this site is to provide convenient access to some of the older literature dealing with this subject.

For a comprehensive review and links to modern papers, I recommend the following link:
What is the experimental basis of Special Relativity?

Wikisource:Relativity is a large online resource of links to older literature, including many papers that Einstein was familiar with and heavily influenced him as he was groping towards the concepts expressed in his seminal 1905 papers.

One-Way Light Speed 

Krisher et al. (1990)

Gagnon et al. (1988) 

Two-Way Light Speed 

Michelson and Morley (1887) (external link)

Illingworth (1927)

Jaseja et al. (1964)

Light Speed from Moving Sources

Beckmann and Mandics (1965)

Alvager et al. (1964)

Filipas and Fox (1964)

Brecher (1977)

Fox (1967)

Babcock and Bergman (1964)

Lorentz Invariance

Turner and Hill (1964)

Wolf et al. (2005) (external link)

Critiques of Miller's Experiments

Roberts (2006) (external link)

Shankland (1955)

One of the earliest and most devastating critiques of Miller's results. Thirring pointed out that Miller's results failed the simplest and most basic criteria required for one to believe in a celestial origin for the measured velocities, namely that the azimuth of supposed drift should show daily variations consistent with the motion of of the source about the celestial pole. Instead, 95 percent of Miller's observations showed an apparent drift pointing towards the northwest quadrant of the compass.
Thirring (1926)

Guided by faulty theory, Miller drew theoretical best fits through his data points in bold lines that were much more prominent than the actual data. The effect was to draw the eye of the reader away from the fact that the theoretically computed lines tended to miss the data entirely. In the following link, I examine Miller's claim that the signals he detected showed constant phase when plotted against sidereal time, thus proving a celestial origin for the signals. The plots at first look rather convincing, until you realize that Miller's bold lines force your eye to look at his fanciful interpretation of the data, rather than the data itself. Erase Miller's fanciful fits, and the apparent constant phase vanishes.

Miller's data was so dirty, that he presented running averages of his data in his plots, rather than the data itself. The manner in which Miller computed his running averages introduced artifact, such as forcing the appearance of 24 hour periodicities in his running average curves when they in fact may have had none.

Low Speed Time Dilation Effects

The pioneering demonstration that SR/GR effects could (just barely) be measured on a commercial jet using vintage 1970's atomic clock technology, and then only with the aid of sophisticated statistical analysis (correlated rate change analysis)
Hafele and Keating (1972) (4 MB download. Sorry for the size, I'll rescan later.)

Current atomic clocks are vastly more stable than those available to Hafele and Keating, and the observation of low speed relativistic effects is now completely routine.
Francis et al. (2002) (external link)
Project GRE2AT: Photo Tour (external link)

Cepheid Variables

Prior to 1914, the bulk of opinion was that Cepheid variables were a form of eclipsing binary. By 1914, however, accumulating evidence indicated that there was something drastically wrong with this interpretation. Shapley summarized the mounting evidence against the binary star hypothesis in this seminal review.
Shapley (1914) (external link)

Crackpots who want to interpret Cepheid variables as binary stars ignore a century of observations totally incompatible with the hypothesis, including secular and random period changes
Szabados (1983) (external link)
Doppler radial velocity measurements, 
Johnson (2003) (external link),
Newsam (Physics 134 class handout, external link),

Doppler line broadening indicative of turbulence,
Yecko et al. (1998) (external link),
Buchler and Kollach (2000) (external link),

direct interferometric measurements of the stars' variable size
Vijh (2003) (informal presentation, external link)
and so on and so forth.

Gain-Assisted Superluminal Light Propagation

The following paper, although quite legitimate, has been the topic of an enormous amount of crackpot debate. Basically, Wang et al. showed that under anomalous dispersion conditions, phase and group velocity of light is observed to be faster than c. No violation of causality takes place, however, because "front velocity" of the light pulses is always less than c. Special relativity remains completely intact.
Wang et al. (2000)

Did Hilbert Really Beat Einstein to GR?

Quoted from Wikipedia: Although Einstein is credited with finding the field equations, the German mathematician David Hilbert published them before Einstein did. This has resulted in not  a few accusations of plagiarism against Einstein, and assertions that the field equations should be called the "Einstein-Hilbert field equations". However, Hilbert never pressed a claim for priority, and recent research has shown that Einstein submitted the correct equations before Hilbert amended his own work to include them. This suggests that Einstein developed the correct field equations first, and that Hilbert may have learned of it afterwards through his correspondence with Einstein.
Renn and Stachel (1999)
I might mention that during the years preceding 1916, Einstein published extensively on his developing ideas towards an "allgemeinen Relativitätstheorie." From 1913 to 1915 alone, I count at least nine major publications, as well as many letters and personal discussions with other researchers, including Hilbert!
Gravitation was Einstein's obsession, and nobody working in the field could have been unaware of Einstein's thoughts on the subject. Given Hilbert's superior mathematical skills, it is not surprising that, inspired by Einstein's writings and personal communications, he should have been able to rapidly develop a theory that was almost, but not quite equivalent to general relativity. Hilbert's paper was published several days before Einstein's paper, but the evidence shows that Hilbert modified his paper in proof after learning of Einstein's correct field equations.

Venus Radar Ranging

Radar ranging measurements of Venus in 1975 showed that the published orbital parameters for the planet were slightly off, and insufficiently accurate for interplanetary navigation of space probes. Somehow or other, crackpots have latched upon this paper as somehow or other disproving relativity.
Kotelnikov et al., 1976

Usenet Newsgroup Silliness

The Usenet newsgroups are home to many anti-relativity crackpots, who regularly try to disprove relativity with stale arguments that have been known to be wrong for many decades, even centuries. There are aetherists, emission theory enthusiasts, and advocates of views so bizarre as to defy classification. Ignoring all experimental evidence contrary to their beliefs, these worthies may see sinusoidal modulations between the error bars of the MMX experiment, deny the validity of Le Verrier's 1859 discovery of anomalous precession in the orbit of Mercury, or accuse experimenters and astronomers of conspiracy and of regularly falsifying their data.

Following the lead of Sekerin, emission theorists have argued that the luminosity curves of stars such as Cepheids and Algol-type binaries may be explained as originating from the variable speed of light rather than from stellar pulsations in the case of Cepheids, or eclipses in the case of Algol-type binaries. Never mind that we have far more data about these stars than merely luminosity data, all corroborating the generally accepted explanations for their variability. On January 3, 2007, one of the better known of these emission theorists for the first time published his predicted radial velocity curves for the Cepheid RT Aurigae... and shows himself capable of resorting to lying...
Here are his results.

Ballistic Theory versus the Sagnac Experiment

Go to my demo

Henri Wilson's Strange Version of Wave Mechanics

Go to Henri Wilson's demo and my commentary on his demo, including an applet

Go to my latest commentary on Henri's "Rayphases" model.