- Hendrik Lorentz
Infobox_Scientist

name = Hendrik Antoon Lorentz

imagesize = 180px

birth_date = birth date|1853|7|18

birth_place =Arnhem ,Netherlands

death_date = death date and age|1928|2|4|1853|7|18

death_place =Haarlem ,Netherlands

nationality =Netherlands

field =Physics

alma_mater =University of Leiden

work_institution =University of Leiden

doctoral_advisor =Pieter Rijke

doctoral_students = Geertruida L. de Haas-LorentzAdriaan Fokker Leonard Ornstein

known_for = Theory of EM radiation

prizes = nowrap|Nobel Prize for Physics (1902)**Hendrik Antoon Lorentz**(July 18 ,1853 –February 4 ,1928 ) was a Dutchphysicist who shared the 1902Nobel Prize in Physics withPieter Zeeman for the discovery and theoretical explanation of theZeeman effect . He also derived the transformation equations subsequently used byAlbert Einstein to describe space and time.**Biography****Early life**Hendrik Lorentz was born in

Arnhem ,Gelderland , the son of Gerrit Frederik Lorentz (1822 – 1893), a well-off nurseryman, and Geertruida van Ginkel (1826 – 1861). In 1862, after his mother's death, his father married Luberta Hupkes. From 1866-1869 he attended the newly established high school in Arnhem, and in 1870 he passed the exams inclassical languages which were then required for admission to University.

Lorentz studiedphysics andmathematics at theUniversity of Leiden , where he was strongly influenced by the teaching of astronomy professorFrederik Kaiser ; it was his influence that led him to become a physicist. After earning abachelor's degree , he returned to Arnhem in 1872 to teach high school classes in mathematics, but he continued his studies inLeiden next to his teaching position. In 1875 Lorentz earned adoctoral degree underPieter Rijke on a thesis entitled " _nl. Over de theorie der terugkaatsing en breking van het licht" (On the theory of reflection and refraction of light), in which he refined the electromagnetic theory ofJames Clerk Maxwell .

In 1881 Hendrik marriedAletta Catharina Kaiser , niece of Frederik Kaiser. She was the daughter ofJohann Wilhelm Kaiser , director of theAmsterdam 's Engraving School and professor ofFine Arts , and designer of the first Dutchpostage stamp s (1852). Later Kaiser was the Director of the National Gallery of Amsterdam. Hendrik and Aletta's eldest daughter Geertruida Luberta Lorentz was to become a physicist as well.**Professor in Leiden**In 1878, only 24 years of age, Lorentz was appointed to the newly established chair in theoretical physics at the

University of Leiden . On January 25 1878, he delivered his inaugural lecture on " _nl. De moleculaire theoriën in de natuurkunde" (The molecular theories in physics).During the first twenty years in Leiden, Lorentz was primarily interested in the theory of electromagnetism to explain the relationship of electricity, magnetism, and light. After that, he extended his research to a much wider area while still focusing on theoretical physics. From his publications, it appears that Lorentz made contributions to mechanics, thermodynamics, hydrodynamics, kinetic theories, solid state theory, light, and propagation. His most important contributions were in the area of electromagnetism, the electron theory, and relativity.

Lorentz theorized that the

atom s might consist of charged particles and suggested that the oscillations of these charged particles were the source of light. When colleague and former student of LorentzPieter Zeeman discovered theZeeman effect in 1896, Lorentz supplied its theoretical interpretation. The experimental and theoretical work was honored with the Nobel prize in physics in 1902. Lorentz' name is now associated with theLorentz-Lorenz formula, theLorentz force , theLorentzian distribution, and theLorentz transformation .**Electrodynamics and relativity**In 1892, with the attempt to explain the

Michelson-Morley experiment , Lorentz proposed that moving bodies contract in the direction of motion (seelength contraction ;George FitzGerald had already arrived at this conclusion, seeFitzGerald-Lorentz Contraction ). Lorentz worked on describing electromagnetic phenomena (the propagation of light) in reference frames that moved relative to each other. He discovered that the transition from one to another reference frame could be simplified by using a new time variable which he called "local time". The local time depended on the universal time and the location under consideration. Lorentz's publications (of 1895 [*Lorentz 1895*] and 1899) [*Lorentz (1899)*] made use of the term local time without giving a detailed interpretation of its physical relevance. In 1900,Henri Poincaré called Lorentz's local time a "wonderful invention" and illustrated it by showing that clocks in moving frames are synchronized by exchanging light signals that are assumed to travel at the same speed against and with the motion of the frame. [*Poincaré 1900*] In 1899, and again in 1904, [*Lorentz 1904*] Lorentz addedtime dilation to his transformations and published what Poincaré in 1905 namedLorentz transformations . It was apparently unknown to Lorentz thatJoseph Larmor had used identical transformations to describe orbiting electrons in 1897. Larmor's and Lorentz's equations look somewhat unfamiliar, but they are algebraically equivalent to those presented by Poincaré and Einstein in 1905. [*Macrossan 1986*] Lorentz's 1904 paper includes the covariant formulation of electrodynamics, in which electrodynamic phenomena in different reference frames are described by identical equations with well defined transformation properties. The paper clearly recognizes the significance of this formulation, namely that the outcomes of electrodynamic experiments do not depend on the relative motion of the reference frame. The 1904 paper includes a detailed discussion of the increase of the inertial mass of rapidly moving objects. In 1905, Einstein would use many of the concepts, mathematical tools and results discussed to write his paper entitled " _de. Elektrodynamik" (Electrodynamics) known today as the theory of special relativity. Because Lorentz laid the fundamentals for the work by Einstein, this theory was called the "Lorentz-Einstein theory" originally.The increase of mass was the first prediction of special relativity to be tested, but from early experiments by Kaufmann it appeared that his prediction was wrong; this led Lorentz to the famous remark that he was "at the end of his Latin." [

*[*] The confirmation of his prediction had to wait until 1908. In 1909, Lorentz published "Theory of Electrons" based on a series of lectures in Mathematical Physics he gave at*http://web.archive.org/web/20050221211608/www.univ-nancy2.fr/poincare/chp/text/lorentz1.html Lorentz à Poincaré*] at web.archive.orgColumbia University . [*Lorentz 1909*]**Assessments**Poincaré (1902) said of Lorentz's theory of electrodynamics:

:"The most satisfactory theory is that of Lorentz; it is unquestionably the theory that best explains the known facts, the one that throws into relief the greatest number of known relations ... it is due to Lorentz that the results of

Fizeau on the optics of moving bodies, the laws of normal and abnormal dispersion and of absorption are connected with each other ... Look at the ease with which the new Zeeman phenomenon found its place, and even aided the classification of Faraday's magnetic rotation, which had defied all Maxwell's efforts." [*Poincaré 1902*]Paul Langevin (1911) said of Lorentz::"It is the great merit of H. A. Lorentz to have seen that the fundamental equations of electromagnetism admit a group of transformations which enables them to have the same form when one passes from one frame of reference to another; this new transformation has the most profound implications for the transformations of space and time" [

*Langevin 1911*] Lorentz and Emil Wiechert (Göttingen) had an interesting correspondence on the topics of electromagnetism and the theory of relativity, and Lorentz explained his ideas in letters to Wiechert. The correspondence between Lorentz and Wiechert has been published by Wilfried Schröder (Arch. ex. hist. Sci, 1984).Lorentz was chairman of the first

Solvay Conference held in Brussels in the autumn of 1911. Shortly after the conference, Poincaré wrote an essay on quantum physics which gives an indication of Lorentz's status at the time::" ... at every moment [the twenty physicists from different countries] could be heard talking of the [quantum mechanics] which they contrasted with the old mechanics. Now what was the old mechanics? Was it that of Newton, the one which still reigned uncontested at the close of the nineteenth century? No, it was the mechanics of Lorentz, the one dealing with the principle of relativity; the one which, hardly five years ago, seemed to be the height of boldness." [

*Poincaré 1913*]Albert Einstein (1953) wrote of Lorentz::"For me personally he meant more than all the others I have met on my life's journey." [

*[*]*http://books.google.nl/books?id=EF2fKDpp8S8C&pg=PA375&lpg=PA375&dq=%22For+me+personally+he+meant+more+than+all+the+others+I+have+met+on+my+life%27s+journey%22&source=web&ots=XPV0HbS5AT&sig=nV8cYUvnu8Wq0_u45wEnYuh6J0s&hl=nl&sa=X&oi=book_result&resnum=2&ct=result Link*]**Later life**In 1912 Lorentz retired early to become director of research at

Teylers Museum inHaarlem , although he remained external professor at Leiden and gave weekly lectures there.Paul Ehrenfest succeeded him in his chair at the University of Leiden, founding the Institute for Theoretical Physics which would become known as theLorentz Institute . In addition to theNobel prize , Lorentz received a great many honours for his outstanding work. He was elected a Fellow of theRoyal Society in 1905. The Society awarded him theirRumford Medal in 1908 and theirCopley Medal in 1918.While Lorentz is mostly known for fundamental theoretical work, he also had an interest in practical applications. In the years 1918-1926, at the request of the Dutch government, Lorentz headed a committee to calculate some of the effects of the proposed

Afsluitdijk (Closure Dike) flood control dam on other seaworks in the Netherlands.Hydraulic engineering was mainly an empirical science at that time, but the disturbance of the tidal flow caused by the Afsluitdijk was so unprecedented that the empirical rules could not be trusted. Lorentz proposed to start from the basichydrodynamic equations of motion and solve the problem numerically. This was feasible for a "human computer ", because of the quasi-one-dimensional nature of the water flow in theWaddenzee . The Afsluitdijk was completed in 1933 and the predictions of Lorentz and his committee turned out to be remarkably accurate. [*Beenackers*]**Death and legacy**Lorentz died in

Haarlem , Netherlands. The respect in which he was held in the Netherlands is apparent from O. W. Richardson's description of his funeral::"The funeral took place at Haarlem at noon on Friday, February 10. At the stroke of twelve the State telegraph and telephone services of Holland were suspended for three minutes as a revered tribute to the greatest man Holland has produced in our time. It was attended by many colleagues and distinguished physicists from foreign countries. The President, Sir Ernest Rutherford, represented the Royal Society and made an appreciative oration by the graveside." Richardson 1929]

Richardson describes Lorentz as:

:" [A] man of remarkable intellectual powers ... . Although steeped in his own investigation of the moment, he always seemed to have in his immediate grasp its ramifications into every corner of the universe. ... The singular clearness of his writings provides a striking reflection of his wonderful powers in this respect. .... He possessed and successfully employed the mental vivacity which is necessary to follow the interplay of discussion, the insight which is required to extract those statements which illuminate the real difficulties, and the wisdom to lead the discussion among fruitful channels, and he did this so skillfully that the process was hardly perceptible."

M. J. Klein (1967) wrote of Lorentz's reputation in the 1920s:

:"For many years physicists had always been eager "to hear what Lorentz will say about it" when a new theory was advanced, and, even at seventy-two, he did not disappoint them." [

*Przibram 1967*]*

Nobel Prize for Physics (1902)

*Rumford Medal (1908)

*Copley Medal (1918)**ee also***

Lorentz force

*Lorentz transformation

*Relativity of simultaneity

*Lorentz-FitzGerald contraction hypothesis

*Lorentz Medal

*Lorentz (crater)

*Lorentz factor

*Geertruida de Haas-Lorentz **References**;Papers of LorentzThere are thirty-six complete papers by Lorentz (mostly in English) that are available for online viewing [

*http://www.historyofscience.nl/works_detail.cfm?RecordId=5 in the Proceedings of the Royal Netherlands Academy of Arts and Science, Amsterdam*] .*citation |first = Hendrik Antoon |last = Lorentz |title = Versuch einer theorie der electrischen und optischen erscheinungen bewegten koerpern |url = http://www.historyofscience.nl/search/detail.cfm?pubid=2690&view=image&startrow=1 |place = Leiden

year = 1895*citation |first = Hendrik Antoon |last = Lorentz |title = Simplified Theory of Electrical and Optical Phenomena in Moving Systems |url = http://www.historyofscience.nl/search/detail.cfm?pubid=209&view=image&startrow=1 |journal = Proc. Acad. Science Amsterdam |volume = 1 |year = 1899 |pages = 427–442

*citation | first=Hendrik Antoon | last=Lorentz | title=Considerations on Gravitation | url=http://www.historyofscience.nl/search/detail.cfm?pubid=260&view=image&startrow=1 | journal=Proc. Acad. Science Amsterdam | volume=2 | pages=559–574 | year=1900

*citation |first = Hendrik Antoon |last = Lorentz |title = Electromagnetic phenomena in a system moving with any velocity smaller than that of light |url = http://www.historyofscience.nl/search/detail.cfm?pubid=615&view=image&startrow=1 |journal = Proc. Acad. Science Amsterdam |volume = 6 |year = 1904 |pages = 809–831

*citation |first = Hendrik Antoon |last = Lorentz |title = The theory of electrons and its applications to the phenomena of light and radiant heat; a course of lectures delivered in Columbia university, New York, in March and April 1906 |place = New York, [NY.] |publisher = Columbia University Press |year = 1909/1916 | url= http://www.archive.org/details/electronstheory00lorerich

*citation | first=Hendrik Antoon | last=Lorentz | title=On EINSTEIN's Theory of gravitation | url =http://www.historyofscience.nl/search/detail.cfm?pubid=2775&view=image&startrow=1 | journal=Proc. Acad. Science Amsterdam | volume=19 | issue=II | pages=1341–1354 | year=1917

*citation | first=Hendrik Antoon | last=Lorentz | title=Lectures on Theoretical Physics (vol. I-III) | url=http://www.archive.org/details/lecturesontheore031600mbp | place=New York, [NY.] | publisher=Macmillan & Co. | year=1927-1931

;Other sources

**citation |first1 = Geertruida L. |last1 = de Haas-Lorentz |author-link = Geertruida de Haas-Lorentz |first2 = Joh. C. (trans.) |last2 = Fagginger Auer |title = H.A. Lorentz: impressions of his life and work |year = 1957 |place= Amsterdam |publisher= North-Holland Pub. Co.

*citation |first = Paul |last = Langevin |author-link = Paul Langevin |title = L'évolution de l'éspace et du temps |journal = Scientia |volume = X |pages = 31–54 |year = 1911 :n.p.

*citation |first = Michael N. |last = Macrossan |title = A note on relativity before Einstein |url = http://espace.library.uq.edu.au/view.php?pid=UQ:9560 |journal = Brit. J. Phil. Sci., |volume = 37 |pages = 232–234 |year = 1986

*citation |first = Henri |last = Poincaré |author-link = Henri Poincaré |title = La théorie de Lorentz et le Principe de Réaction |journal = Archives Neerlandaises |volume = V |pages = 253–278 |year = 1900 See [

*http://www.physicsinsights.org/poincare-1900.pdf English translation*] .*citation |first = Henri |last = Poincaré |author-link = Henri Poincaré |title = La science et l'hypothèse |place = Paris, [France] |publisher = Ernest Flammarion |year = 1902 : n.p.. The quotation is from the English translation (citation |first = Henri |last = Poincaré |author-link = Henri Poincaré |title = Science and hypothesis |place = New York, [NY.] |publisher = Dover Publications |page = 175 |year = 1952)

*citation |first = Henri |last = Poincaré |author-link = Henri Poincaré |title = Dernières pensées |place = Paris, [France] |publisher = Ernest Flammarion |year = 1913 :n.p.. The quotation in the article is from the English translation: (citation |first1 = Henri |last1 = Poincaré |author-link = Henri Poincaré

first2 = John W. (trans.) |last2 = Bolduc |title = Mathematics and science: last essays |place = New York, [NY.] |publisher = Dover Publications |year = 1963 :n.p.)*citation |first1 = Karl (ed.) |last1 = Przibram |first2 = Martin J. (trans.) |last2 = Klein |title = Letters of wave mechanics: Schrödinger, Planck, Einstein, Lorentz. Edited by Karl Przibram for the Austrian Academy of Sciences |place = New York, [NY.] |publisher = Philosophical Library |year = 1967 :n.p.

*citation |first = O. W. |last = Richardson |title = Hendrik Antoon Lorentz |journal = J. Lond. Math Soc. |volume = 4 |issue = 1 |pages = 183–192 |year = 1929 : n.p. The biography which refers to this article (but gives no pagination details other than those of the article itself) is this one: MacTutor Biography|id=Lorentz

* Sri Kantha, S. Einstein and Lorentz. "Nature", July 13, 1995; 376: 111.(Letter);Endnotes

**External links***

*

**citation |first = Carlo |last = Beenakker |title = Lorentz and the Zuiderzee project |url = http://ilorentz.org/history/zuiderzee/zuiderzee.html |place = Leiden, [The Netherlands] |publisher = Instituut Lorentz, University of Leiden

*citation |first = Albert |last = van Helden |contribution = Hendrik Antoon Lorentz 1853-1928 |url = http://www.historyofscience.nl/author.cfm?RecordId=5|editor1-first = Klaas |editor1-last = van Berkel |editor2-first = Albert |editor2-last = van Helden |editor3-first = Lodewijk (eds.) |editor3-last = Palm |title = A History of Science in The Netherlands: Survey, Themes and Reference |place = Leiden, [The Netherlands] |publisher = Brill |pages = 514–518 |year = 1999 |isbn = 9004100067

*citation |first = Anne J. |last = Kox |title = Ph.D. students of H.A. Lorentz: 1881-1921 |url = http://www.lorentz.leidenuniv.nl/IL-publications/dissertations/lorentz.txt |place = Leiden, [The Netherlands] |publisher = University of Leiden

*citation |first1 = John J. |last1 = O'Connor |first2 = Edmund F. |last2 = Robertson |title = Hendrik Lorentz, MacTutor History of Mathematics archive |url = http://www-history.mcs.st-andrews.ac.uk/Biographies/Lorentz.html |accessdate = 2008-05-01

* [*http://www.vpro.nl/programma/zomergasten/afleveringen/22708246/items/23535592/ Movie of Lorentz's funeral*]Persondata

NAME= Lorentz, Hendrik Antoon

ALTERNATIVE NAMES=

SHORT DESCRIPTION=Physicist

DATE OF BIRTH=July 18 ,1853

PLACE OF BIRTH=Arnhem ,Netherlands

DATE OF DEATH=February 4 ,1928

PLACE OF DEATH=Haarlem ,Netherlands

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**Hendrik Lorentz**— Hendrik Antoon Lorentz Cet article de physique fait partie de la série relativité Avant Einstein Histoire de la … Wikipédia en Français**Hendrik Lorentz**— Hendrik Antoon Lorentz, gemalt von Menso Kamerlingh Onnes Hendrik Antoon Lorentz (* 18. Juli 1853 in Arnheim; † 4. Februar 1928 in Haarlem) war ein niederländischer … Deutsch Wikipedia**Physiknobelpreis 1902: Hendrik Lorentz — Pieter Zeeman**— Die Niederländer wurden für ihre außergewöhnlichen Verdienste bei der Erforschung des Einflusses des Magnetismus auf Strahlungserscheinungen ausgezeichnet. Biografien Hendrik Antoon Lorentz, * Arnheim (Niederlande) 18. 7. 1853, ✝ Haarlem 4 … Universal-Lexikon**Hendrik Antoon Lorentz**— Hendrik Antoon Lorentz, gemalt von Menso Kamerlingh Onnes Hendrik Antoon Lorentz (* 18. Juli 1853 in Arnheim; † 4. Februar 1928 in Haarlem) war ein niederländischer … Deutsch Wikipedia**Hendrik A. Lorentz**— Hendrik Antoon Lorentz Cet article de physique fait partie de la série relativité Avant Einstein Histoire de la … Wikipédia en Français**Lorentz Medal**— is an award given every four years by the Royal Netherlands Academy of Arts and Sciences. It was established in 1925 on the occasion of the 50th anniversary of the doctorate of Hendrik Lorentz. This solid gold medal is given for important… … Wikipedia**Lorentz**— may refer to:In literature:* Friedrich Lorentz, author of works on the Pomeranian language * Pare Lorentz (1905 1992), American author and film directorIn physics:* Hendrik Lorentz (1853–1928), Dutch physicist and Nobel Prize winner * Lorentz… … Wikipedia**Lorentz transformation**— A visualisation of the Lorentz transformation (full animation). Only one space coordinate is considered. The thin solid lines crossing at right angles depict the time and distance coordinates of an observer at rest with respect to that frame; the … Wikipedia**Lorentz force**— This article is about the equation governing the electromagnetic force. For a qualitative overview of the electromagnetic force, see Electromagnetism. For magnetic force of one magnet on another, see force between magnets. Electromagnetism … Wikipedia**Lorentz-FitzGerald contraction**— /lawr euhnts fits jer euhld, lohr /, Physics. See FitzGerald contraction. [1920 25] * * * or space contraction In relativity physics, the shortening of an object along the direction of its motion relative to an observer. Dimensions in other… … Universalium