List of experimental errors and frauds in physics

Experimental science demands repeatability of results, in part because there are so many ways that experiments can go wrong. There are several famous experiments whose results were later retracted or discredited. The most common problem is simply overlooking an important source of noise or bias; such sources sometimes become apparent only with extensive experience with complex equipment or theories. Some errors are introduced when the experimenter's desire for a certain result unconsciously influences selection of data (a problem which today is avoided by double-blind protocols). There have also been cases of deliberate scientific misconduct.

Famous experimental errors

A reported faint visual effect that experimenters could still "see" even when the supposed causative element in their apparatus had been secretly disconnected.[1]
Published in Annalen der Physik and said to be the first journal paper to cite Einstein's 1905 electrodynamics paper. Kaufmann's paper stated that his results were not compatible with special relativity. According to Gerald Holton, it took a decade for the shortcomings of Kaufmann's test to be realised: during this time, critics of special relativity were able to claim that the theory was invalidated by the available experimental evidence.[2]
A number of earlier experimenters claimed to have found the presence or lack of gravitational redshift, but Adams' result was supposed to have settled the issue ("definitively established", RWL "Relativity" [3]). It is no longer considered credible, one of the more charitable interpretations being that his data may have been contaminated by stray light from Sirius A . The first "reliable" confirmations of the effect appeared in the 1960s.[4]
Originally reported in Nature in 1955[5] and later. Diamond synthesis was later determined to be impossible with the apparatus. Subsequent analysis indicated that the first gemstone (used to secure further funding) was natural rather than synthetic. Artificial diamonds have since been produced.[6]
In 1970 Joseph Weber, a physicist working with the University of Maryland, reported the detection of 311 excitations on his test equipment designed to measure gravitational waves.[7] He utilized an apparatus consisting of two one ton aluminum bars in a vacuum tubes. He took extreme measures to isolate the equipment from seismic and other interferences. By the end of the 1970s Weber's work was considered spurious as it could not be replicated by others. Still Weber is considered one of the fathers of gravitational wave detection and inspiration for other projects such as LIGO.
Data from Fermilab in 1976 appeared to indicate a new particle at about 6 GeV which decayed into electron-positron pairs. Subsequent data and analysis indicated that the apparent peak resulted from random noise. The name is a pun on upsilon, the proposed name for the new particle and Leon M. Lederman, the principal investigator. The illusory particle is unrelated to the Upsilon meson, discovered in 1977 by the same group.
Main article: Water memory
Jacques Benveniste was a French immunologist who in 1988 published a paper in the prestigious scientific journal Nature describing the action of very high dilutions of anti-IgE antibody on the degranulation of human basophils, findings which seemed to support the concept of homeopathy. Biologists were puzzled by Benveniste's results, as only molecules of water, and no molecules of the original antibody, remained in these high dilutions. Benveniste concluded that the configuration of molecules in water was biologically active. Subsequent investigations have not supported Benveniste's findings, which are now cited as an example of pathological science.
Main article: Cold fusion
Since the announcement of Pons and Fleischmann in 1989, cold fusion has been considered to be an example of a pathological science.[8] Two panels convened by the US Department of Energy, one in 1989 and a second in 2004, did not recommend a dedicated federal program for cold fusion research.[9] In 2007 Nature reported that the American Chemical Society would host an invited symposium on cold fusion and low energy nuclear reactions at their national meeting for the first time in many years.[10][11]

Alleged scientific misconduct cases

Rupp had been considered one of the best experimenters of his time, until he was forced to admit that his notable track record was at least partly due to the fabrication of results.[12]
Main article: Schön scandal
A succession of high-profile peer-reviewed papers previously published by Jan Hendrik Schön were subsequently found to have used obviously fabricated data.
Element 118 (ununoctium) was announced, and then the announcement withdrawn by Berkeley after claims of irreproducibility. The researcher involved, Victor Ninov, denies doing anything wrong.[13]
Main article: Haruko Obokata
Findings of stimulus-triggered acquisition of pluripotency (STAP) cells were not able to be duplicated and on investigation, serious allegations of data fabrication were brought against the researcher, Haruko Obokata.

See also

References

  1. ↑ Wood, R.W. (29 September 1904). "The N-Rays". Nature 70 (1822): 530–531. Bibcode:1904Natur..70..530W. doi:10.1038/070530a0. After spending three hours or more in witnessing various experiments, I am not only unable to report a single observation which appeared to indicate the existence of the rays, but left with a very firm conviction that the few experimenters who have obtained positive results, have been in some way deluded. A somewhat detailed report of the experiments which were shown to me, together with my own observations, may be of interest to the many physicists who have spent days and weeks in fruitless efforts to repeat the remarkable experiments which have been described in the scientific journals of the past year.
  2. ↑ Jeremy Bernstein, "Einstein" (1973) pp.81–85 — Kaufmann experiment
  3. ↑ Albert Einstein, "Relativity" (15th ed., 1954) — Appendix 3 has a note from the translator mentioning Adams' "definitive" result.
  4. ↑ F. Wesemael, "A comment on Adams' measurement of the gravitational redshift of Sirius B", Royal Astronomical Society, Quarterly Journal (ISSN 0035-8738), 26, Sept. 1985, 273–278
  5. ↑ F. P. Bundy, H. T. Hall, H. M. Strong and R. H. Wentorf (1955). "Man-Made Diamonds". Nature 176 (4471): 51–55. doi:10.1038/176051a0.
  6. ↑ Bovenkerk et al., "Errors in diamond synthesis", Nature 365 19 (1993) "Scientific Correspondence"
  7. ↑ Lindley, D.,"Focus: A Fleeting Detection of Gravitational Waves", Phy. Rev. Focus, 16 19 (2005),
  8. ↑ Labinger JA, Weininger SJ (2005). "Controversy in chemistry: how do you prove a negative?—the cases of phlogiston and cold fusion". Angew Chem Int Ed Engl 44 (13): 1916–22. doi:10.1002/anie.200462084. PMID 15770617. So there matters stand: no cold fusion researcher has been able to dispel the stigma of 'pathological science' by rigorously and reproducibly demonstrating effects sufficiently large to exclude the possibility of error (for example, by constructing a working power generator), nor does it seem possible to conclude unequivocally that all the apparently anomalous behavior can be attributed to error.
  9. ↑ U.S. Department of Energy (2004). "Report of the Review of Low Energy Nuclear Reactions" (PDF). Washington, DC: doe.gov. Archived from the original (PDF) on 2007-01-14. Retrieved 2008-07-19.
  10. ↑ "Cold fusion is back at the American Chemical Society" Nature News, 29 March 2007, doi:10.1038/news070326-12
  11. ↑ Van Noorden, R. (2007). "Cold fusion back on the menu". Chemistry World (April 2007). Retrieved 2008-05-25.
  12. ↑ Michael Brooks, on Emil Rupp, "Convenient untruths", New Scientist, No2630 (17 Nov 2007) pp. 58–59
    See also Jeroen van Dongen, "Emil Rupp, Albert Einstein and the Canal Ray Experiments on Wave-Particle Duality: Scientific Fraud and Theoretical Bias" http://arxiv.org/abs/0709.3099
  13. ↑ George Johnson (October 15, 2002). "At Lawrence Berkeley, Physicists Say a Colleague Took Them for a Ride" (reprint). The New York Times.
This article is issued from Wikipedia - version of the Thursday, October 22, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.