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  Paul Dirac - Wikipedia, the free encyclopedia
Paul Adrien Maurice Dirac, OM, FRS (IPA: [dɪ'ræk]) (August 8, 1902 – October 20, 1984) was a British theoretical physicist and a founder of the field of quantum physics.
Dirac is regarded as the founder of quantum electrodynamics, being the first to use that term.
Dirac was the Lucasian Professor of Mathematics at Cambridge from 1932 to 1969.
en.wikipedia.org /wiki/Paul_Dirac   (1662 words)

 Paul Dirac
Paul Adrien Maurice Dirac, (August 8, 1902 - October 20, 1984) was a physicist and a founder of the field of quantum physics.
This allowed Dirac to predict the existence of the positron, the electron's anti-particle; the positron was subsequently observed by Anderson in 1932.
Dirac was Lucasian professor of mathematics at Cambridge from 1932 to 1969 and an undergraduate at Bristol University.
www.ebroadcast.com.au /lookup/encyclopedia/di/Dirac.html   (190 words)

 Encyclopedia :: encyclopedia : Paul Dirac   (Site not responding. Last check: 2007-09-20)
Paul Adrien Maurice Dirac, OM (August 8, 1902 – October 20, 1984) was a British theoretical physicist and a founder of the field of quantum physics.
Paul Dirac was born in the English city of Bristol.
Dirac's Principles of Quantum Mechanics, published in 1930, became one of the standard textbooks on the subject and is still used today.
www.hallencyclopedia.com /Paul_Dirac   (1475 words)

 Paul Dirac
Paul Dirac received the Nobel Prize in Physics in 1933 at the age of 31.
Dirac was so unusual in the logic and precision of his interaction with the world, both in and out of physics, that legions of "Dirac stories" have become attached to him and have acquired a life of their own.
Dirac married "Wigner's sister", so known among the physicists because she was the sister of the noted Hungarian theoretical physicist Eugene Wigner.
www.dirac.ch /PaulDirac.html   (1152 words)

 [No title]   (Site not responding. Last check: 2007-09-20)
This allowed Dirac to formulate the Dirac sea and predict the existence of the positron, the electron's anti-particle; the positron was subsequently observed by Anderson in 1932.
Dirac's Principles of Quantum Mechanics, published in 1930, pioneered the use of linear operators as a generalization of the theories of Heisenberg and Schrödinger.
Dirac shared the Nobel Prize for physics in 1933 with Erwin Schrödinger "for the discovery of new productive forms of atomic theory".
www.wikiwhat.com /encyclopedia/p/pa/paul_dirac.html   (232 words)

 Paul Dirac - Wikipedia
Paul Adrien Maurice Dirac nasceva in Bristol, Anglaterra le 8 de augusto 1902.
Dirac veniva pro le prime vice a Trieste in junio de 1968 pro le occasion del Symposio International super le Physica Contemporanee, ubi ille pronunciava un discurso super le methodos del physica theoric.
Dirac etiam attendeva le incontro de Marcel Grossman, tenite al Centro in le anniversario centennial del nascimento de Albert Einstein in 1979.
ia.wikipedia.org /wiki/Paul_Dirac   (386 words)

 [No title]
In his first publication, in November 1925, Dirac elaborated a method for deriving the equation of motion from quantum mechanics, and a few months later he clearly defined a number of concepts that were to play a major role in the field.
Dirac's fame stems from his formulation in 1928 of a mathematical description of elementary particles that accords with both quantum mechanics and the theory of relativity.
Dirac was Lucasian Professor of Mathematics at Cambridge from 1932 to 1969 and professor of physics at Florida State University, from 1971 until his death.
www.phy.hr /~dpaar/fizicari/xdirac.html   (269 words)

 Dirac biography
Dirac had been hoping to have his research supervised by Ebenezer Cunningham, for by this time Dirac had become fascinated in the general theory of relativity and wanted to undertake research on this topic.
Dirac was appointed Lucasian professor of mathematics at the University of Cambridge in 1932, a post he held for 37 years.
Dirac unified the theories of quantum mechanics and relativity theory, but he also is remembered for his outstanding work on the magnetic monopole, fundamental length, antimatter, the d-function, bra-kets, etc.
www-groups.dcs.st-and.ac.uk /~history/Biographies/Dirac.html   (2515 words)

 Featured Physicists - Paul Dirac 1902-1984
Paul Adrien Maurice Dirac was born in Bristol, England, in 1902.
Dirac's first degree, obtained at the Merchant Venturer's Technical College, was in electrical engineering, but he had no real interest in the subject and after graduating spent two years studying mathematics at the University of Bristol.
During this period Dirac worked on a variety of topics including magnetic monopoles (hypothetical magnetic charges) and the speculation that the fundamental constants of physics might be gradually changing in a co-ordinated way.
physicalworld.org /restless_universe/html/ru_dira.html   (554 words)

 Paul Dirac: the purest soul in physics (February 1998) - Physics World - PhysicsWeb
Paul Dirac was born at 15 Monk Road in Bishopston, Bristol, on 8 August 1902, and educated at the nearby Bishop Road Primary School.
In Dirac's equation, spin did not have to be imported: it emerged - along with the magnetism of the electron - as an inevitable property of an electron that was both a quantum particle and a relativistic one.
Dirac also showed how quantum waves for many electrons had to be constructed, incorporating the philosophically intriguing fact that any two of these particles are absolutely identical and so cannot be distinguished in any way.
physicsweb.org /articles/world/11/2/9   (3112 words)

 Dirac, Paul Adrien Maurice. The Columbia Encyclopedia, Sixth Edition. 2001-05
In 1928, Dirac published a version of quantum mechanics that took into account the theory of relativity (see quantum theory).
Dirac’s equation for the motion of a particle is a relativistic modification of the Schrödinger wave equation, the basic equation of quantum mechanics.
Dirac also received the Copley Medal of the Royal Society in 1952 for this and other contributions to the quantum theory, including his formulation (with Enrico Fermi) of the Fermi-Dirac statistics and his work on the quantum theory of electromagnetic radiation.
www.bartleby.com /65/di/Dirac-Pa.html   (219 words)

 Dirac Centennial Celebration   (Site not responding. Last check: 2007-09-20)
Paul Adrien Maurice Dirac (August 8th 1902 -- October 20th 1984) was one of the great theoretical physicists of the twentieth century.
Dirac spent most of his career in the Mathematics Faculty in the University of Cambridge and at St.
Dirac's lecture "The Relation between Mathematics and Physics" which he delivered on presentation of the JAMES SCOTT prize, February 6, 1939.
www.damtp.cam.ac.uk /dirac   (187 words)

 CERN Courier - Paul Dirac: a genius in the - IOP Publishing - article
Paul Dirac died, aged 82, on 20 October 1984 as a Nobel Prize winner (1933) and a member of the British Order of Merit (1973).
With it, he was able to develop his transformation theory, which showed explicitly (see P Dirac 1927 in Further reading) how it was possible to relate a range of different formulations of quantum mechanics, all of them equivalent in their physical consequences, such as Schrödinger's wave equation and Heisenberg's matrix mechanics.
In 1927 Dirac sought to develop a theory of the electron that satisfied this requirement and he published his relativistically invariant equation for the electron early in 1928 (see P Dirac 1928 in Further reading).
www.cerncourier.com /main/article/42/7/15   (1851 words)

 Paul Dirac: Tutte le informazioni su Paul Dirac su Encyclopedia.it   (Site not responding. Last check: 2007-09-20)
Paul Dirac: Tutte le informazioni su Paul Dirac su Encyclopedia.it
Paul Adrien Maurice Dirac, (8 Agosto 1902 - 20 Ottobre 1984) fisico teorico, annoverato tra i fondatori della fisica quantistica.
Questo permise a Dirac, nel 1930, di predire l'esistenza del positrone, avente la stessa massa e carica dell'elettrone, ma di segno opposto (soluzioni ad energia negativa della sua equazione).
www.encyclopedia.it /p/pa/paul_dirac.html   (238 words)

 Interview with Paul Adrian Maurice Dirac - F. David Peat   (Site not responding. Last check: 2007-09-20)
Like Newton before him Dirac has made contributions that are respected by his colleagues not only for their depth of insight and clarity but for the power and economy with which mathematics is brought to bear upon the problems of nature.
Dirac was able to show that the two theories were equivalent, and in the process provided quantum theory with a sound mathematical footing.
Dirac is concerned with the occurrence of large numerical constants in physical theories.
www.fdavidpeat.com /interviews/dirac.htm   (2796 words)

 Dirac (disambiguation) - Wikipedia, the free encyclopedia
Paul Dirac (1902–1984), a British theoretical physicist and a founder of the field of quantum physics
Dirac delta function, a mathematical function introduced by British theoretical physicist Paul Dirac
Dirac, Charente, a commune of the Charente département, in France
en.wikipedia.org /wiki/Dirac   (144 words)

 BookRags: Paul Dirac Biography
Paul Adrien Maurice Dirac was one of the twentieth century's leading theoretical physicists.
Dirac was born in Bristol, England, on August 8, 1902.
Dirac's theory also suggested experiments a researcher might use to look for the positive electron, examining situations in which positively charged electrons would be produced (always in connection with negatively charged electrons and always in such a way that the two would annihilate each other).
www.bookrags.com /biography/paul-dirac-wop   (1171 words)

Dirac declared to Kuhn that his approach was fundamentally geometrical and that he was "just no good" at doing "masses of algebraic calculations without picturing what the equation means".
Dirac often said that when he was developing quantum mechanics he used his favorite branch of mathematics --projective geometry -- which concerns the relationships between points and straight lines.
Dirac's genius was quickly recognized -- he was the youngest participant in the elite Solvay Congress of 1927, at which Niels Bohr and Albert Einstein began their long debate about the foundations of quantum mechanics.
scienceweek.com /2005/sw051118-6.htm   (1371 words)

 Dirac, Einstein and physics (March 2000) - Physics World - PhysicsWeb
Dirac was puzzled by an unprecedented property of space-time discovered by Lorentz in his studies of electromagnetic forces, whereby if space was real, time had to be imaginary, and vice versa.
Dirac deemed that this tricky matter had to be understood, and decided to study the electron in complex space-time.
The great novelty of the Dirac formalism was the introduction of the spinor, which is a mathematical function having four components.
physicsweb.org /article/world/13/3/2   (2058 words)

 SPACE.com -- Wild Posters Celebrate 100th Birthday of Dour Father of Antimatter
British-born physicist Paul Dirac, who predicted the real-world science of what became the fictional antimatter propulsion in Star Trek, was born 100 years ago today.
Dirac's lack of popularity might have something to do with the fact that, despite winning the Nobel Prize in 1933, he was a recluse.
Dirac is most famous for predicting the anti-electron, also known as the positron.
www.space.com /scienceastronomy/dirac_posters_020808.html   (615 words)

 Physics.org - Search Results
Paul Adrien Maurice Dirac was born on 8th August, 1902, at Bristol, England.
His work was concerned with the mathematical and theoretical aspects of quantum mechanics and he began work on the new quantum mechanics as soon as it was introduced.
Paul Adrien Maurice Dirac (1902 - 1984) shared with Erwin Schrödinger the Nobel Prize for Physics in 1933 for their work on atomic spectra.
www.physics.org /results/search.asp?q=paul+dirac&uu=0   (137 words)

 Bringing the Dirac Coincidences up to date
In his paper, Dirac noted that, for some unexplained reason, the ratio of the electrostatic to gravitational force between an electron and a proton is roughly equal to the age of the universe divided by an elementary time constant, implying that
The upshot, then, is that by combining Dirac’s empirical coincidences with standard inflation theory, one seems to arrive at a way of estimating vacuum energy densities that for the first time gives values consistent with observational constraints at all the critical cosmological epochs.
O By linking Dirac’s coincidences to concepts drawn from inflation theory, we are led to the possibility that the most recent vacuum phase transition, due to quark-hadron confinement, led to a remnant vacuum energy making an appreciable contribution to the total mass-energy of the current universe.
ourworld.compuserve.com /homepages/rajm/agdirac.htm   (2042 words)

 Paul Dirac - The Fundamental Equations of Quantum Theory
Dirac's attention was drawn to a mysterious mathematical relationship, at first sight unintelligible, that Heisenberg had reached.
Several weeks later, back in Cambridge, Dirac suddenly recognized that this mathematical form had the same structure as the Poisson Brackets that occur in the classical dynamics of particle motion.
First editions, journal issues, of Dirac’s first two papers on quantum mechanics, which succeeded in giving a complete formulation that was more general and useful than that of his contemporaries.
www.theworldsgreatbooks.com /dirac.htm   (454 words)

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