61. Uccello, Paolo (orig. Paolo Di Dono) It. Painter In Florence _1396 _17871862 uhlenbeck, george Eugene US (Indonesian-born) phys.; introduced conceptof spin with Samuel Goudsmit _1900-1988 Ulam, Stanislaw Marcin US (Pol.-born http://world.std.com/obi/Biographical/biog_dict.u

62. 1900_sc Translate this page uhlenbeck, george Eugene (Djakarta, Indonesia 1900-Boulder, Colorado 1988)fisico statunitense di origine danese, studiò matematica e fisica all http://www.viandante.it/sito24/XX secolo/1900_sc.php

Il Viandante in rete dal 1996 HOME E-MAIL STORIA GIALLI ... VIAGGI NUOVO CERCA NEL SITO FORUM una storia particolare Nuova Ricerca ANNO 1900 storia e politica religione ... arte scienze economia letterE e Teatro ... cinema Leone XIII Dobzhansky, Theodosius (Nemirov, Ucraina 1900-Davis, California 1975) genetista statunitense di origine russa, trasferitosi negli Stati Uniti nel 1926, considerato il fondatore della moderna teoria dell'evoluzione vista in chiave genetica La genetica e l'origine delle specie Le basi biologiche della libertà umana Genetica dei processi evolutivi Gabor, Dennis (Budapest 1900) fisico ungherese, premio Nobel per la fisica nel 1971 per aver ideato l'olografia. Granit, Ragnar Arthur (Helsinge, Filandia 1900) neurofisiologo finlandese, si interessò alla psicofisica della visione; premio Nobel per la fisiologia e la medicina nel 1967 con H. Hartline Meccanismi sensori della retina Joliot-Curie, Frédéric

63. Spin (physics) In the fall of that year, the same thought came to two young Dutch physicists,george uhlenbeck and Samuel Goudsmit. Under the advice http://www.fact-index.com/s/sp/spin__physics_.html

Main Page See live article Alphabetical index Spin (physics) Spin is an intrinsic angular momentum associated with quantum mechanical particles . Unlike classical "spinning" objects, which derive their angular momentum from the rotation of their constituent parts, spin angular momentum is not associated with any rotating internal masses. For example, elementary particles , such as the electron , possess spin angular momentum, even though they are point particles. Also, unlike classical mechanical spinning, the spin is not described by a vector , but by a two-component object (for spin-1/2 particles): there is an observable difference in how it transforms under coordinate rotations. Other subatomic particles , such as neutrons , which have zero electrical charge, also possess spin. When applied to spatial rotations , the principles of quantum mechanics state that the observed values of angular momentum (which are eigenvalues of the angular momentum operator) are restricted to integer or half-integer multiples of h . This applies to spin angular momentum as well. Furthermore, the

64. Matematické Texty - Historie Matematiky století Alfred Tarski. John Wilder Tukey. Alan Turing. george Eugene uhlenbeck.Karen Keskulla uhlenbeck. Pavel Samuilovic Urysohn. Abraham Wald. http://home.pf.jcu.cz/~novakp08/Matematika/Historie.htm

Historie matematiky První èeské stránky vìnované historii matematiky - internetový rozcestník Pavel Novák - Historie matematiky od pravìku po 19. století. Historie matematiky na Olomoucké universitì Stránka vìnovaná èeskému matematikovi 20. století - Karel Rychlík Iveta Jírovská - diplomová práce, která obsahuje velké množství historických poznámek - Zlatý øez Èlánky o historii matematiky z èasopisu Natura Z historie matematiky a fyziky. (1) Podle knihy dr. Jiøího Mrázka a materiálù Turnbullské univerzity v St. Andrews ve Velké Británii zpracoval: Jiøí Svršek. Matematik, fyzik a popularizátor dr. Jiøí Mrázek. Matematika ve starovìku. Matematika od støedovìku do 19. století. Trigonometrické funkce. Z historie matematiky a fyziky. (2) Historie èísla pí. Kvadratické, kubické a bikvadratické rovnice. Vznik matematické analýzy. Prvoèísla. Fermatova poslední vìta. Z historie matematiky a fyziky (3) Problém ètyø barev. Vývoj teorie grup. Poèátky teorie množin. Abstraktní lineární prostory. Z historie matematiky a fyziky. (4)

65. A Personal Profile Of Karen K. Uhlenbeck A Personal Profile of Karen K. uhlenbeck. I also remember a little paperback bookcalled One, Two, Three, (and, in?) Infinity by george Gamow, and I remember http://rene.ma.utexas.edu/users/uhlen/pers.html

A Personal Profile of Karen K. Uhlenbeck (This information is published to aid middle and high school steudents in their projects. Please be sure and refer to the published sourse of this article. It is in S. Ambrose et al. "Journeys of Women in Science and and Engineering, No Universal Constants", Temple University Press. Do not quote from sources, even sources on the web, without giving proper documentation!) Field: Mathematics Research Area: Partial Differntial Equations Present Position: Professor and Sid W. Richardson Foundation Regents Chair in Mathematics, University of Texas at Austin Date/Place of Birth: August 24, 1942 / Cleveland, Ohio PhD: Brandeis University in 1968 under Dr. Richard Palais Honors: Member of the American Academy of Arts and Sciences (1985) Member of the National Academy of Sciences (1986) My first love is the outdoors I enjoy mountain climbing, back-packing, hiking, canoeing, swimming, and bicycling. Many of these interests I inherited from my parents who, at age 83, are still hiking and back-packing. I am at home in nature and, when I can't be out in the wilderness, I can often be found in my garden at my home in Austin. That's the real me. My day-to-day life is something very different. As a young academic I worked by myself a lot. In fact, that was one of the attractions of mathematics. I am the eldest of four children and I always considered dealing with my siblings the hardest things I've ever done in my life. That had a great impact on my choosing a career I wanted a career where I didn't have to work with other people. I've always been competitive, but I don't like the attitudes of people who don't win (i.e. "sore losers"). So I found it attractive to work in an area where I compete only with myself and didn't have to deal with the negative aspects of competition. As my career advanced, however, I had to learn better communication skills in order to interact with graduate students. This was a very difficult stage of my career, but surprising to me, I found it very rewarding to deal with younger mathematicians, and I now truly enjoy collaborative projects.

66. NATIONAL MEDAL OF SCIENCE RECIPIENTS 1962-1999 Frederick D. Rossini, Rice University Verner E. Suomi, University of WisconsinHenry Taube, Stanford University george F. uhlenbeck, Rockefeller University http://www.physics.ohio-state.edu/~wilkins/osu_and_ohio/medalofscience.html

NATIONAL MEDAL OF SCIENCE RECIPIENTS 1962-1999 ANDREASEN, Nancy C. Biological Sciences University of Iowa College of Medicine BALDESCHWIELER, John D. Chemistry California Institute of Technology David Baltimore, California Institute of Technology Felix E. Browder, Rutgers University, Piscataway, NJ Ronald R. Coifman, Yale University James W. Cronin, The Enrico Fermi Institute, The University of Chicago Jared Diamond, UCLA Medical School Leo P. Kadanoff, The James Franck Institute, The University of Chicago Lynn Margulis, University of Massachusetts, Amherst Stuart A. Rice, The James Franck Institute, The University of Chicago John Ross, Stanford University Susan Solomon, National Oceanic and Atmospheric Administration, Boulder Robert M. Solow, Massachusetts Institute of Technology Kenneth N. Stevens, Massachusetts Institute of Technology Bruce N. Ames, University of California, Berkeley Don L. Anderson, California Institute of Technology John N. Bahcall, Institute for Advanced Study, Princeton University John W. Cahn, National Institute of Standards and Technology

67. Fisica Applicata - Guida Di SuperEva Translate this page che porterà nel 1925-26 alla meccanica quantistica, due giovani dottorandi allievidi Paul Ehrenfest a Leida, Samuel Goudsmit e george uhlenbeck, proposero in http://guide.supereva.it/fisica_applicata/interventi/2001/09/65729.shtml

document.write(''); Mappa Fai di sEva la tua Home Help Sei qui superEva guide Arte, Cultura e Scienze Fisica applicata Fisica applicata di Claudio Lanzieri Home Newsletter Forum ... Diventa anche tu una Guida Cerca nella Guida: Applicazioni Industriali Articoli Scientifici Attualità Fisica applicata ... Fisica di base Grandi Uomini Ho letto su un giornale INFN Informazioni dal mondo della Ricerca e dell'Industria Proposte dalla comunità ... Tecnologia Applicativa Feed Vuoi essere sempre aggiornato sulle notizie di Fisica applicata? Le Guide preferite Risorse per studenti: fisica www.euro-download.com [sito sponsor] Alunni.net: fisica online tuttoappunti.hostance.com [sito sponsor] Fisica www.sussidiario.it [sito sponsor] Grandi Uomini 100 anni dalla nascita di Enrico Fermi (2) Enrico Fermi, fisico teorico e sperimentale, nato a Roma il 29 settembre 1901, morto a Chicago, Illinois, il 29 novembre 1954. Autore delle prime teorie sulle interazioni deboli, è noto soprattutto per le sue ricerche sperimentali di fisica nucleare che portano alla scoperta della fissione nucleare ed ai suoi successivi sviluppi; per queste ricerche compiute a Roma, Fermi ottenne il premio Nobel nel 1938. pervenuto indipendentemente a risultati analoghi.

68. Spin (physics) - Wikipedia, The Free Encyclopedia idea. In the fall of that year, the same thought came to two youngDutch physicists, george uhlenbeck and Samuel Goudsmit. Under http://en.wikipedia.org/wiki/Spin_(physics)

Spin (physics) From Wikipedia, the free encyclopedia. In quantum mechanics spin is an intrinsic angular momentum associated with particles . For example, elementary particles , such as the electron , possess spin angular momentum , even though they are (for other purposes) like point particles. Other subatomic particles , such as neutrons , which have no electrical charge , also possess spin. Table of contents 1 Quantum angular momentum and spin angular momentum 2 Observations 3 Comparison with classical mechanics 4 History ... edit Quantum angular momentum and spin angular momentum When applied to spatial rotations , the principles of quantum mechanics state that the observed values of angular momentum eigenvalues of the angular momentum operator ) are restricted to integer or half-integer multiples of h . This applies to spin angular momentum as well. Furthermore, the spin-statistics theorem states that particles with integer spin are bosons , and particles with half-integer spin are fermions edit Observations A rotating charged body in an inhomogeneous magnetic field will experience a force . Electrons in an inhomogeneous magnetic field also experience a force, and this is why people have imagined the electron as "spinning around". The observed forces vary for different electrons, and these differences are attributed to differences in spin. The spin of electrons is therefore typically measured by observing their deflection in an inhomogeneous magnetic field. In accordance with the predictions of theory, only half-integer multiples of

69. Nuclear Age 9. Francis B. Silsbee. NBS. 10. Isidor Isaac. Rabi. Columbia. 11. george Eugene.uhlenbeck. Columbia. 12. george. Gamow. george Washington. 13. Edward. Teller. georgeWashington. http://www.gwu.edu/~physics/gplate.htm

Announcement of the Nuclear Age at GW The 1939 public announcement by Niels Bohr of the fission of uranium by Otto Hahn (in Berlin) took place on the GW Campus (Hall of Government) at a conference organized by George Gamow and jointly held with the Carnegie Institution of Washington. Below is photo of GWU-Carnegie Inst. participants at Lisner Auditorium, January, 1939. Gamow and Merle Tuve organized ten such conferences, gathering the best minds to discuss the most pressing questions in physics. Attending the 1939 conference on Low Temperature Physics were (by order in picture, starting with Otto Stern first row, counting left-to-right): First Name Last Name Institution L.H. Adams D.H. Andrews Edward Uhler Condon F.G. Keyes F.C. Kracek E. Posnjak A.E. Ruark Otto Stern Carnegie Tech, Pittsburgh Enrico Fermi Rome, Columbia J. Fleming Carnegie Inst. of Wash. Niels Henrik David Bohr Copenhagen, Princeton Fritz London Duke, Paris Harold Clayton Urey Columbia Ferdinand G. Brickwedde NBS Gregory Breit Wisconson, Carnegie Inst. Francis B. Silsbee NBS Isidor Isaac Rabi Columbia George Eugene Uhlenbeck Columbia George Gamow George Washington Edward Teller George Washington Maria Goeppert-Mayer Johns Hopkins Francis Bitter MIT Hans Albrecht Bethe Cornell Hugh Grayson-Smith Univ. of Toronto

70. Notre Dame Archives Inventory: UDIS Bio U V. 1937- UDIS130/07 - (subject within a folder) Uff, Keith - London Law Program1947- UDIS119/14 - (folder) uhlenbeck, george A. - Honorary Degree http://www.archives.nd.edu/udis-u.htm

Archives Public Relations and Information Biographical Files (U) Ueberroth, Peter V. - 1937- :: UDIS130/07 - (subject within a folder) Uff, Keith - London Law Program 1947- :: UDIS119/14 - (folder) Uhlenbeck, George A. - Honorary Degree Recipient :: UDIS130/07 - (subject within a folder) Ulrich, Eugene Charles Jr. - 1938- :: UDIS144/87 - (folder) Upshaw, William (Red Fox)- Navajo Indian Student :: UDIS119/15 - (folder) Urban, M. Robertia - Music - 1924- :: UDIS119/16 - (folder) Urbanski, Edmund D. - Modern Languages :: UDIS119/17 - (folder) Urey, Harold Clayton - Honorary Degree Recipient :: UDIS130/07 - (subject within a folder) Utech, Myron R :: UDIS141/03 - (subject within a folder) Utz, Patrick William - 1938- :: UDIS141/64 - (folder) Utz, Winfielo Roy Jr - 1919- :: UDIS141/03 - (subject within a folder)

71. AIP Niels Bohr Library Wolfgang Pauli, Linus Pauling, Isidor Isaac Rabi, Harrison McAllister Randall,Adolf Smekal, Arnold Sommerfeld, Thomas, uhlenbeck (george s father), george http://libserv.aip.org:81/ipac20/ipac.jsp?uri=full=3100001~!4640~!0&profile=aipn

72. Források: G Dióhéjban. Budapest Corvina, 1990. Goudsmit, Samuel A.—uhlenbeck,george E. It Might as well be Spin. In History of Physics. http://members.iif.hu/visontay/ponticulus/forrasok/g.html

rovatok j¡t©k arch­vum jegyzetek mutat³k kitekintő v©lem©nyek inform¡ci³k ... magyar¡zatok forr¡sok G¡bor Gy¶rgy Ingres hegedűje Budapest: Magvető K¶nyvkiad³, 1972 G¡ldi L¡szl³ Magyar—spanyol k©zisz³t¡r Budapest: Terra, 1969 Galilei, Galileo Matematikai ©rvel©sek ©s bizony­t¡sok (Discorsi e dimonstrazioni matematiche, intorno a due nuove scienze; attenenti alla mecanica i movimenti locali) Matematikai ©rvel©sek ©s bizony­t¡sok k©t ºj tudom¡ny¡g, a mechanika ©s a mozg¡sok k¶r©ből Galileo Galilei ºr, a R³mai Akad©mia tagja, a fens©ges toscanai nagyherceg filoz³fusa ©s első matematikusa toll¡b³l. A f¼ggel©kben n©h¡ny merev test sºlypontj¡nak vizsg¡lat¡val Ford­totta D¡vid G¡bor A jegyzeteket Gazda Istv¡n ©s Pesthy Monika ¡ll­totta ¶ssze A k¶tetet szakmai szempontb³l Vekerdi L¡szl³ n©zte ¡t Az ut³sz³t Vekerdi L¡szl³ ­rta Budapest: Eur³pa, 1986 Gamow, George A fizika t¶rt©nete (Biography of Physics). A szerző rajzaival. Ford­totta: Kiss Istv¡n. A verseket ford­totta: B¡r¡ny Gy¶rgy

73. Washington Square News from across the country noticed NYU Peace Coalition signs and responded positively to the group during the march, uhlenbeck said. President george W. Bush http://www.nyunews.com/news/campus/5500.html

The Washington Square Arch NEWS CAMPUS CITY FEATURES ... LINKS Issue date: 10.28.2002 Thousands protest in D.C. NYU students send hundreds to antiwar rally by Lisa Fleisher News Editor related stories Habitat to deliver petition to City Hall Members of NYU Habitat for Humanity will join a citywide coalition today at City Hall to lobby New York City officials for adequate housing. A 'fair' cup of joe At the urging of an NYU student group, NYU Dining Services now offers fair trade coffee at no additional cost at all campus retail locations that sell coffee. Help for the homeless Members of NYU Habitat for Humanity are protesting New York City’s response to rising homelessness and inadequate housing. Bound to the bank CAS sophomore Devin Carberry chains himself to a Citibank at 57th Street and Park Avenue in protest of the company’s global policies. Pro-war students find voice at NYU While antiwar protests have intensified since the start of a U.S.-led military campaign against Iraq last week, Nate Donchez is one student whose pro-war views have been overshadowed. NYU students joined thousands of activists on Saturday in a march through Washington, D.C., protesting possible U.S. military action in Iraq.

74. Discovery Of Electron Spin This photograph was taken around 1928 in Ann Arbor, three years after george uhlenbeck(left) and Samuel Goudsmit (right) proposed the idea that each electron http://www.lorentz.leidenuniv.nl/history/spin/spin.html

This photograph was taken around 1928 in Ann Arbor, three years after George Uhlenbeck (left) and Samuel Goudsmit (right) proposed the idea that each electron spins with an angular momentum of one half Planck constant and carries a magnetic moment of one Bohr magneton. At the time of their discovery, Uhlenbeck and Goudsmit were studying in Leiden with Paul Ehrenfest. At the center is Hendrik Kramers, another of Ehrenfest's students. The discovery note in Naturwissenschaften is dated 17 October 1925. One day earlier Ehrenfest had written to Lorentz to make an appointment and discuss a "very witty idea" of two of his graduate students. When Lorentz pointed out that the idea of a spinning electron would be incompatible with classical electrodynamics, Uhlenbeck asked Ehrenfest not to submit the paper. Ehrenfest replied that he had already sent off their note, and he added: "You are both young enough to be able to afford a stupidity!" Ehrenfest's encouraging response to his students ideas contrasted sharply with that of Wolfgang Pauli. As it turned out, Ralph Kronig, a young Columbia University PhD who had spent two years studying in Europe, had come up with the idea of electron spin several months before Uhlenbeck and Goudsmit. He had put it before Pauli for his reactions, who had ridiculed it, saying that "it is indeed very clever but of course has nothing to do with reality". Kronig did not publish his ideas on spin. No wonder that Uhlenbeck would later refer to the "luck and privilege to be students of Paul Ehrenfest".

75. Goudsmit On The Discovery Of Electron Spin Today I will talk a little about history. The history of the discoveryof the electron spin by george uhlenbeck and myself. That http://www.lorentz.leidenuniv.nl/history/spin/goudsmit.html

The discovery of the electron spin S.A. Goudsmit The golden jubilee of the Dutch Physical Society in April 1971 was concluded with a lecture by Samuel Goudsmit on the history of the discovery of the electron spin. Actually, his could hardly be called a polished lecture; it was a grandiose artistic performance, full of wit and emotional involvement. Goudsmit, then at the end of his scientific career, gave a very personal account of how chance and the guidance by Ehrenfest, their far-sighted supervisor, led him and Uhlenbeck to formulate their remarkable discovery. When, in connection with the present book , the question turned up how to discuss the early history of electron spin, my thoughts returned to that day, nearly twenty five years ago, when I had been impressed by Goudsmit's truly humane wisdom. After weighing various alternatives I thought: why not let the master speak for himself? Thus I came to translate Goudsmit's historic lecture. Its text was not meant to be published as a paper, but Goudsmit subsequently consented to its publication from a tape recording . Apart from a few minor changes I have tried to present Goudsmit's very personal style by giving a literal translation of the words spoken in Dutch. A number of references to the papers mentioned by Goudsmit have been added. J.H. van der Waals

76. MIT Radiation Laboratory Series Volume 24 Threshold Signals Lawson, James L. And Threshold Signals Lawson, James L. and george E. uhlenbeck Volume 24 MIT RadiationLaboratory series. ( reference supplied by brew books). Introduction. http://www.brewbooks.com/ref/rl/ref_radlab_v24.html

Threshold Signals Lawson, James L. and George E. Uhlenbeck Volume 24 MIT Radiation Laboratory series ( reference supplied by brew books Introduction The fundamental process in the reception of electromagnetic signals is to make perceptible to the human observer certain features of the incoming electromagnetic radiation. Since perception is the acquisition of information, these features may be called "intelligence" or "information". The electromagnetic wave may contain this information in many ways: the particular method used to abstract it and make it perceptible depends upon the structure of the original radiation. ... To change the characteristics of the signal into a form suitable for human perception, several events must usually take place. The complete system in which this chain of events occurs can be conveniently referred to as the receiving system and can be subdivided into four functional parts ... The Antenna The Receiver The Indicator The Human Observer Home Reference MIT Radlab Series Updated 31 May 1999

77. Inference With Non-Gaussian Ornstein-Uhlenbeck Processes For Stochastic Volatili a class of models where the volatility behaves according to an OrnsteinUhlenbeckprocess, driven Gallant, A Ronald Rossi, Peter E Tauchen, george, 1992. http://ideas.repec.org/p/wpa/wuwpem/0201002.html

This file is part of IDEAS , which uses RePEc data Papers Articles Software Books ... Help! Inference With Non-Gaussian Ornstein-Uhlenbeck Processes for Stochastic Volatility Author info Abstract Publisher info Download info ... Statistics Author Info James E. Griffin (University of Kent at Canterbury) Mark F.J. Steel (University of Kent at Canterbury) Additional information is available for the following registered author(s): Mark Steel Abstract Download Info To download: If you experience problems downloading a file, check if you have the proper application to view it first. Information about this may be contained in the File-Format links below. In case of further problems read the IDEAS help file . Note that these files are not on the IDEAS site. Please be patient as the files may be large. File URL: http://econwpa.wustl.edu:80/eps/em/papers/0201/0201002.pdf File Format: application/pdf File Function: Download Restriction: no File URL: http://econwpa.wustl.edu:80/eps/em/papers/0201/0201002.ps.gz File Format: application/postscript File Function: Download Restriction: no Publisher Info Paper provided by Economics Working Paper Archive at WUSTL in its series Econometrics with number 0201002.

78. Loodus- Ja Täppisteadlaste Eluaastaid U uhlenbeck, george Eugene (19001988) (HOL päritolu USA füüsik)Urõson, Pavel (1898-1924) (matemaatik) Tagasi algusesse / Up. http://www.physic.ut.ee/~janro/

A B C D ... Y A Abbe, Ernst Abbot, Charles Greeley Abel, Niels Henrik (1802-1829) (NOR matemaatik) Abelson, Philip Hauge Abraham, Max Abrikossov, Aleksei A. Adams, John Couch (1819-1892) (GBR astronoom) Aepinus, Franz Ulrich Theodor Agnesi, Maira Gaetana (1718-1799) (matemaatik) d'Alembert, Jean Baptiste Le Round (1717-1783) (FRA filosoof ja matemaatik) Amontons, Guillaume Ampére, André Marie Anaxagoras Anaximandros Anaximenes Apollonios, Pergest (~260-~170 e.m.a.) (kreeka matemaatik) Arago, Dominique Francois Aragon Armand Archimedes Aristarchos (320-250 e.m.a.) Aristoteles Arzela, Cesare (1847-1912) (matemaatik) Tagasi algusesse / Up B Babinet, Jacques Bacon, Roger (1214-1294) (inglise filosoof ja looduseuurija) Baire, Louis René (1874-1932) (matemaatik) Banach, Stefan (1892-1945) (POL matemaatik) Barrow, Isaac Bartels, Johann Martin Christian (1769-1836) (matemaatik) Bartholinus, Erasmus (1625-1698) (DEN loodusteadlane) Bateman, Harry (1882-1946) (matemaatik) Bayes, Thomas (1702-1761) (GBR matemaatik) Becquerel, Antoine Henri Bell, Alexander Graham

79. VnExpress - Giai Dieu Day Va Ban Giao Huong Vu Tru (46) Nam 1925, hai nhà v?t lý Hà Lan là george uhlenbeck và Samuel Goudsmit dãnh?n th?y r?ng, m?t s? l?n các s? li?u khó hi?u liên http://vnexpress.net/Vietnam/Khoa-hoc/Tu-sach/2004/03/3B9D0CD8/

var RelatedFolder=116; var VirtualFolder='/vietnam/khoa-hoc/tu-sach/2004/03/3b9d0cd8'; var CurrentFolder='/vietnam/khoa-hoc/tu-sach'; setTypingMode(1); Daily news from Vietnam's most popular Online Magazine Includes world national sports business VnExpress Vietnam News Daily Economy Online Internet Magazine Gateway IXP ISP ICP FPT Portal Tin nhanh Cap nhat Bao Dien tu Vietbao TinViet VietNews Mua Ban Rao Vat Tu Van Viec Lam Hanoi Ha Noi Saigon Sai gon Tin tuc Tintuc Hue Da Nang Danang VDC Netnam Saigonnet Sggp VET Nhandan Nhan dan Laodong Lao dong Kinhte Kinh te Kinhdoanh Kinh doanh Spin Contact us LComplete = 1;

80. BTD Aralik '97: Tarihlerle Elektron Ekim ayinda ise george uhlenbeck ve Samuel Goudsmit, bu kuantum sayisiniyeni bir mekanik özellikten, elektron spininden ortaya çikiyor olarak http://www.biltek.tubitak.gov.tr/dergi/97/aralik/elektron1.html

Tarihlerle Elektron Elektron’un Keþfi Herman Helmholtz’un 1881 yýlýnda varsaydýðý “elektrik atomu”na George Johnstone Stoney “elektron” adýný verdi. Ocak ayýnda Emil Wiechert, katot ýþýnlarýnýn eski elektrik yüklü temel parçacýklardan oluþtuðunu ve bu parçacýklarýn en küçük atomdan çok daha hafif olduklarýný kanýtladý. Nisan ayýnda, J.J.Thomson, katot ýþýnlarýnýn yük/kütle (e/m) oranýnýn iyonlarýnkinden 1000 kez daha küçük olduðunu buldu. Kasým ayýnda, Willy Wien, Thomson’un bulgularýný doðruladý. Elektronun keþfi, ayný sýralarda ortaya çýkan bir baþka olayla desteklendi. Bu, Ekim 1896 ve Ekim 1897 yýllarý arasýnda Peter Zeeman tarafýndan gösterilen, bir manyetik alanda atomik spektral çizgilerin üçlü yarýlmalarý idi. Zeeman etkisi adý verilen bu olgu, Eylül 1897’de Hendrik Antoon Lorentz tarafýndan teorik olarak açýklandý. Elektron, Ýletkenlik, Beta-ýþýnlarý ve Görelilik (1897-1915) J.J. Thomson, J.S.E Townsend ile birlikte katot ýþýnlarýnýn özelliklerini inceledi ve elektronun yükünü belirledi. Marie ve Pierre Curie, b-ýþýnlarýnýn hýzlý katot ýþýnlarý olduklarýný gösterdiler.

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