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In 1889 Michelson became a professor at [[Clark University]] at [[Worcester, Massachusetts|Worcester]], [[Massachusetts]] and in 1892 was appointed professor and the first head of the department of physics at the newly organized [[University of Chicago]].
In 1889 Michelson became a professor at [[Clark University]] at [[Worcester, Massachusetts|Worcester]], [[Massachusetts]] and in 1892 was appointed professor and the first head of the department of physics at the newly organized [[University of Chicago]].

In 1898, he noted the [[Gibbs phenomenon]] in Fourier analysis on a mechanical computer that was constructed by him.<ref>{{cite book|last=Wolfram|first=Stephen|title=A New Kind of Science|publisher=Wolfram Media, Inc.|year=2002|page=899|isbn=1-57955-008-8}}</ref>


In 1907, Michelson had the honor of being the first American to receive a [[Nobel Prize in Physics]] "for his optical precision instruments and the spectroscopic and metrological investigations carried out with their aid". He also won the [[Copley Medal]] in 1907, the [[Henry Draper Medal]] in 1916 and the [[Gold Medal of the Royal Astronomical Society]] in 1923. A [[Impact crater|crater]] on the [[Moon]] is named after him.
In 1907, Michelson had the honor of being the first American to receive a [[Nobel Prize in Physics]] "for his optical precision instruments and the spectroscopic and metrological investigations carried out with their aid". He also won the [[Copley Medal]] in 1907, the [[Henry Draper Medal]] in 1916 and the [[Gold Medal of the Royal Astronomical Society]] in 1923. A [[Impact crater|crater]] on the [[Moon]] is named after him.

Revision as of 21:11, 4 June 2018

Not to be confused with the athlete Albert Michelsen.

Albert A. Michelson
University of Berlin
Known forSpeed of light
Michelson–Morley experiment
Spouse(s)
Margaret Hemingway
​
​
(m. 1877; div. 1898)​
; 3 children
Edna Stanton
​
(m. 1899)​
; 3 children
Awards
Robert Millikan
Signature

Albert Abraham Michelson

FRSE (December 19, 1852 – May 9, 1931) was an American physicist known for his work on measuring the speed of light and especially for the Michelson–Morley experiment. In 1907 he received the Nobel Prize in Physics
, becoming the first American to win the Nobel Prize in a science.

Biography

Michelson was born in Strzelno, Province of Posen in Germany (now Poland), the son of Samuel Michelson and his wife, Rozalia Przyłubska, both of Jewish descent.[2] He moved to the US with his parents in 1855, at the age of two. He grew up in the mining towns of Murphy's Camp, California and Virginia City, Nevada, where his father was a merchant. His family was Jewish by birth but non-religious, and Michelson himself was a lifelong agnostic.[3][4][5] He spent his high school years in San Francisco in the home of his aunt, Henriette Levy (née Michelson), who was the mother of author Harriet Lane Levy.[6]

President

École Polytechnique
in Paris.

In 1877, he married Margaret Hemingway, daughter of a wealthy New York stockbroker and lawyer and the niece of his commander William T. Sampson. They had two sons and a daughter.[11][12]

Michelson was fascinated with the sciences, and the problem of measuring the

luminiferous ether. He later moved on to use astronomical interferometers
in the measurement of stellar diameters and in measuring the separations of binary stars.

In 1889 Michelson became a professor at Clark University at Worcester, Massachusetts and in 1892 was appointed professor and the first head of the department of physics at the newly organized University of Chicago.

In 1898, he noted the Gibbs phenomenon in Fourier analysis on a mechanical computer that was constructed by him.[16]

In 1907, Michelson had the honor of being the first American to receive a Nobel Prize in Physics "for his optical precision instruments and the spectroscopic and metrological investigations carried out with their aid". He also won the Copley Medal in 1907, the Henry Draper Medal in 1916 and the Gold Medal of the Royal Astronomical Society in 1923. A crater on the Moon is named after him.

Michelson died in Pasadena, California at the age of 78. The University of Chicago Residence Halls remembered Michelson and his achievements by dedicating 'Michelson House' in his honor. Case Western Reserve has dedicated a Michelson House to him, and Michelson Hall (an academic building of science classrooms, laboratories and offices) at the United States Naval Academy also bears his name. Clark University named a theatre after him.[17] Michelson Laboratory at Naval Air Weapons Station China Lake in Ridgecrest, California is named for him. There is a display in the publicly accessible area of the Lab which includes facsimiles of Michelson's Nobel Prize medal, the prize document, and examples of his diffraction gratings.

Numerous awards, lectures, and honors have been created in Albert A. Michelson’s name.

Michelson-Morley Award and Lecture, along with the Michelson Lecture Series,[20] and the Michelson Postdoctoral Prize Lectureship,[21] all of which are given annually by Case Western Reserve University; the A.A. Michelson Award presented every year by the Computer Measurement Group;[22] the Albert A. Michelson Award given by the Navy League of the United States;[23] and the Michelson Memorial Lecture Series[24] presented annually by the Division of Mathematics and Science at the U.S. Naval Academy
.

Family

In 1899, he married Edna Stanton. They raised one son and three daughters.[12]

Speed of light

Page one of Michelson's Experimental Determination of the Velocity of Light
Concluding page of Michelson's Experimental Determination of the Velocity of Light

Early measurements

As early as 1869, while still serving as an officer in the United States Navy, Michelson started planning a repeat of the rotating-mirror method of Léon Foucault for measuring the speed of light, using improved optics and a longer baseline. He conducted some preliminary measurements using largely improvised equipment in 1878, about the same time that his work came to the attention of Simon Newcomb, director of the Nautical Almanac Office who was already advanced in planning his own study. Michelson published his result of 299,910 ± 50 km/s in 1879 before joining Newcomb in Washington DC to assist with his measurements there. Thus began a long professional collaboration and friendship between the two.

Simon Newcomb, with his more adequately funded project, obtained a value of 299,860 ± 30 km/s, just at the extreme edge of consistency with Michelson's. Michelson continued to "refine" his method and in 1883 published a measurement of 299,853 ± 60 km/s, rather closer to that of his mentor.

U.S. Navy. He rejoined the U.S. Navy in World War I,[25]
when this portrait was taken.

Mount Wilson and Lookout Mountain

In 1906, a novel electrical method was used by

National Bureau of Standards to obtain a value for the speed of light
of 299,781 ± 10 km/s. Though this result has subsequently been shown to be severely biased by the poor electrical standards in use at the time, it seems to have set a fashion for rather lower measured values.

From 1920, Michelson started planning a definitive measurement from the Mount Wilson Observatory, using a baseline to Lookout Mountain, a prominent bump on the south ridge of Mount San Antonio ("Old Baldy"), some 22 miles distant.

In 1922, the

U.S. Coast and Geodetic Survey began two years of painstaking measurement of the baseline using the recently available invar tapes. With the baseline length established in 1924, measurements were carried out over the next two years to obtain the published value of 299,796 ± 4 km/s.[26]

Famous as the measurement is, it was beset by problems, not least of which was the haze created by the smoke from forest fires which blurred the mirror image. It is also probable that the intensively detailed work of the

Richter scale
.

The now-famous Michelson–Morley experiment also influenced the affirmation attempts of peer Albert Einstein's theory of general relativity and special relativity, using similar optical instrumentation. These instruments and related collaborations included the participation of fellow physicists Dayton Miller, Hendrik Lorentz, and Robert Shankland.

Michelson, Pease, and Pearson

The period after 1927 marked the advent of new measurements of the speed of light using novel electro-optic devices, all substantially lower than Michelson's 1926 value.

Michelson sought another measurement, but this time in an evacuated tube to avoid difficulties in interpreting the image owing to atmospheric effects. In 1929, he began a collaboration with Francis G. Pease and Fred Pearson to perform a measurement in a 1.6 km tube 3 feet in diameter at the Irvine Ranch near Santa Ana, California.[27][28] In multiple reflections the light path was increased to 5 miles. For the first time in history the speed of light was measured in an almost perfect vacuum of 0.5 mm of mercury. Michelson died with only 36 of the 233 measurement series completed and the experiment was subsequently beset by geological instability and condensation problems before the result of 299,774 ± 11 km/s, consistent with the prevailing electro-optic values, was published posthumously in 1935.[28]

Michelson-Morley Interferometry Experiment

Main article: Michelson–Morley experiment

In 1887 he collaborated with colleague

Lorentz contraction
equations as a means of explaining the null result.

There has been some historical controversy over whether Albert Einstein was aware of the Michelson–Morley results when he developed his theory of special relativity, which pronounced the aether to be "superfluous." In a later interview, Einstein said of the Michelson–Morley experiment, "I was not conscious it had influenced me directly... I guess I just took it for granted that it was true."[29] Regardless of Einstein's specific knowledge, the experiment is today considered the canonical experiment in regards to showing the lack of a detectable aether.[30][31]

The precision of their equipment allowed Michelson and Morley to be the first to get precise values for the fine structure in the atomic spectral lines[32] for which in 1916 Arnold Sommerfeld gave a theoretical explanation, introducing the fine-structure constant.

Astronomical interferometry

Hooker Telescope
implements Michelson's stellar interferometer (1920). Mirrors on that stage (not visible in picture) redirect starlight from two smaller apertures up to 20 feet (6m) apart into the telescope.

In 1920 Michelson and

Hooker Telescope
, producing interference fringes observed through the eyepiece. The measurement of stellar diameters and the separations of binary stars took up an increasing amount of Michelson's life after this.

Beginning in the 1970's, astronomical interferometry has been revived, with the configuration using two (or more) separate apertures (with diameters small compared to their separation) being often referred to as "Michelson Stellar Interferometry." This was to distinguish it from

NPOI
.

Michelson in popular culture

Commemorative plaque in Strzelno, Poland, were Michelson was born, founded by Polish Physical Society.

In an episode of the television series

U.S. Naval Academy, despite the opposition of the bigoted town schoolteacher (played by William Schallert). Bonanza was set in and around Virginia City, Nevada
, where Michelson lived with his parents prior to leaving for the Naval Academy. In a voice-over at the end of the episode, Greene mentions Michelson's 1907 Nobel Prize.

The home in which Michelson lived as a child in Murphys Camp, California is now a tasting room for Hovey Wine.

New Beast Theater Works in collaboration with High Concept Laboratories produced a 'semi-opera' about Michelson, his obsessive working style and its effect on his family life. The production ran from February 11 to February 26, 2011 in Chicago at The Building Stage. Michelson was portrayed by Jon Stutzman. The play was directed by David Maral with music composed by Joshua Dumas.[citation needed]

Norman Fitzroy Maclean
wrote an essay "Billiards is a Good Game"; published in The Norman Maclean Reader (ed. O. Alan Weltzien, 2008), it is an appreciation of Michelson from Maclean's vantage point as a graduate student regularly watching him play billiards.

Honors and awards

A monument at United States Naval Academy marks the path of Michelson's experiments measuring the speed of light.

Michelson was a member of the Royal Society, the National Academy of Sciences, the American Physical Society and the American Association for the Advancement of Science.

The Computer Measurement Group gives an annual A. A. Michelson Award.

See also

Notes

  1. ^ a b Loyd S. Swenson, Jr., The Ethereal Aether, University of Texas Press, 2013.
  2. ^ "Albert Abraham Michelson 1852–1931". American Institute of Physics.
  3. ^ Naukowe, Łódzkie (2003). Bulletin de la Société des sciences et des lettres de Łódź: Série, Recherches sur les déformations, Volumes 39–42. Société des sciences et des lettres de Łódź. p. 162. Michelson's biographers stress, that our hero was not conspicuous by religiousness. His father was a free-thinker and Michelson grew up in non-religious family and have no opportunity to acknowledge the belief of his forebears. He was agnostic through his whole life and only for the short period he was a member of the 21st lodge in Washington.
  4. ISBN 978-0-375-72609-5
    . Morley was deeply religious. His original training had been in theology and he only turned to chemistry, a self-taught hobby, when he was unable to enter the ministry. Michelson, by contrast, was a religious agnostic.
  5. ^ 1984; Dorothy Michelson Livingston; One Pass Productions; Cinema Guild. The Master of Light: A Biography of Albert A. Michelson. University of Chicago Press. p. 106. On the religious question, Michelson disagreed with both these men. He had renounced any belief that moral issues were at stake in ... {{cite book}}: |author= has numeric name (help)
  6. ^ Levy, 920 O'Farrell Street, 47.
  7. ^ Nimitz Library's Virtual Exhibits – LibExhibits
  8. Bibcode:2002JAHH....5..165S. {{cite journal}}: Cite journal requires |journal= (help
    )
  9. ^ "USNO - Our Command History". U.S. Naval Observatory.
  10. Bibcode:2002JAHH....5..165S
    .
  11. ISBN 978-1-906165-22-2
    . "In 1877, he married Margaret Hemingway, daughter of a wealthy New York stockbroker and lawyer. This marriage lasted twenty years and produced two sons and a daughter."
  12. ^ a b "Michelson, Albert Abraham". American National Biography. New York: Oxford University Press. 1999.
  13. ^ "raman-scattering.eu".[failed verification]
  14. ^ "Optics at the U.S. Naval Academy". Optical Society of America.
  15. ^ "Michelson's 1879 determinations of the speed of light". Department of Statistics and Actuarial Science, University of Waterloo (Canada).
  16. ISBN 1-57955-008-8
    .
  17. ^ "Visual and Performing Arts - Little Center". Clark University.
  18. ^ "Michelson Remembered". Nimitz Library, US Naval Academy.
  19. ^ "The ABB Sponsored Bomem-Michelson Award". Coblentz Society. 2017.
  20. ^ "Michelson Lectures". Case Western Reserve University. 2017.
  21. ^ "Michelson Postdoctoral Prize Lectureship". Case Western Reserve University. 2017.
  22. ^ "Awards & Scholarships: AA Michelson Award Winners". Computer Measurement Group. 2017.
  23. ^ "Albert A. Michelson Award". Navy League of the United States. 2016.
  24. ^ "Michelson Memorial Lecture Series". U.S. Naval Academy. 2017.
  25. ^ a b "Albert A. Michelson - Facts".
  26. ^ Garner, C. L., Captain (retired) (April 1949). "A Geodetic Measurement of Unusually High Accuracy" (PDF). U.S. Coast and Geodetic Survey Journal. Coast and Geodetic Survey: 68–74. Retrieved August 13, 2009.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  27. ^ "Michelson's Last Experiment". Science. 73 (1899): 10–14. May 22, 1931.
  28. ^ a b Michelson, A. A.; Pease, F. G.; Pearson, F. (1935). "Measurement of the velocity of light in a partial vacuum". Contributions from the Mount Wilson Observatory. 522: 1–36 – via Astrophysics Data System.
  29. ^ Swenson, Loyd S. Jr., The Ethereal Aether: A History of the Michelson–Morley–Miller Aether-Drift Experiments, 1880–1930, University of Texas Press, 1972
  30. On the Electrodynamics of Moving Bodies
     appears to reference the experiment on first glance—"together with the unsuccessful attempts to discover any motion of the earth relatively to the 'light medium,' suggest that the phenomena of electrodynamics as well as of mechanics possess no properties corresponding to the idea of absolute rest"—it has been shown that Einstein was referring to a different category of experiments here.
  31. ^ Holton, Gerald, "Einstein, Michelson, and the 'Crucial' Experiment", Isis, Vol. 60, No. 2 (Summer, 1969), pp. 133–197
  32. ^ AA. Michelson and E. W. Morley, Amer. J. Sci.34, 427 (1887); Phil Mag. 24, 463 (1887).
  33. ^ "Henry Draper Medal". National Academy of Sciences. Archived from the original on January 26, 2013. Retrieved February 19, 2011. {{cite web}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)

References

External links

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