- William Lawrence Bragg
name = William Lawrence Bragg
birth_date = birth date|1890|3|31|df=y
North Adelaide, South Australia
death_date = Death date and age|1971|7|1|1890|3|31|df=yes
Ipswich, Suffolk, England
Australia/ United Kingdom
University of Manchester University of Cambridge
University of Adelaide University of Cambridge
J. J. ThomsonW.H. Bragg
John Crank Ronald Wilfried Gurney
prizes = nowrap|
Nobel Prize in Physics(1915)
footnotes = At 25, the youngest person ever to receive a Nobel Prize. He was the son of W.H. Bragg. Note that the PhD did not exist at Cambridge until 1919, and so
J. J. Thomsonand W.H. Bragg were his equivalent mentors.
Sir William Lawrence Bragg CH, FRS, (
31 March 1890– 1 July 1971) was an Australian physicistwho shared the Nobel Prize in Physicsin 1915 with his father Sir William Henry Bragg. He was the director of the Cavendish Laboratory, Cambridge when the epochal discovery of the structure of DNA was made by James Watsonand Francis Crickin February 1953.
Bragg was born in
North Adelaide, South Australia. He was an impressionable boy and showed an early interest in science and mathematics. His father, William Henry Bragg, was Professor of Mathematics and Physics at the University of Adelaide. Shortly after starting school aged 5, William Lawrence Bragg fell from his tricycle and broke his arm. His father had recently read about Röntgen's experiments in Europe and used the newly discovered X-rays to examine the broken arm. This is the first recorded surgical use of X-rays in Australia.
Bragg was a very able student. After beginning his studies at St Peter's College, in 1904 he went to the University of Adelaide at age 14 to study mathematics, chemistry and physics, graduating in 1908. In the same year his father accepted a job at the
University of Leeds, and brought the family back to England. Bragg entered Trinity College, Cambridgein the autumn of 1909 and received a major scholarship in mathematics, despite taking the exam while in bed with pneumonia. After initially excelling in mathematics, he transferred to the physics course in the later years of his studies, and graduated in 1911.
Bragg is most famous for his law on the diffraction of
X-rays by crystals. Bragg's lawmakes it possible to calculate the positions of the atoms within a crystal from the way in which an X-ray beam is diffracted by the crystal lattice. He made this discovery in 1912, during his first year as a research student in Cambridge. He discussed his ideas with his father, who developed the X-ray spectrometer in Leeds. This tool allowed many different types of crystals to be analysed. The collaboration between father and son led many people to believe that the father had initiated the research, a fact that upset the son.
Bragg's research work was interrupted by both
World War Iand World War II. During both wars he worked on sound ranging methods for locating enemy guns, in this work he was aided by William Sansome Tucker. In autumn 1915 his brother was killed at Gallipoli. At about the same time, William Lawrence Bragg received the news that he received the Nobel Prizein Physics, aged 25, making him the youngest ever winner of a Nobel Prize. Between the wars, from 1919 to 1937, he worked at the Victoria University of Manchesteras Langworthy Professor of Physics. He married Alice Hopkinson in 1921. He was knighted in 1941.
After World War II, he returned to Cambridge, splitting the
Cavendish Laboratoryinto research groups. He believed that 'the ideal research unit is one of six to twelve scientists and a few assistants'. In 1948 Bragg became interested in the structure of proteins and was partly responsible for creating a group that used physics to solve biological problems. He played a major part in the 1953 discovery of the structure of DNA, in that he provided support to Francis Crickand James D. Watsonwho worked under his aegis at the Cavendish. Bragg was gratified to see that the X-ray method that he developed forty years before was at the heart of this profound insight into the nature of life itself. At the same time at the Cavendish Max Perutzwas also doing his Nobel Prizewinning work on the structure of haemoglobin. Bragg subsequently successfully lobbied for and nominated Crick, Watson and Maurice Wilkinsfor the 1962 Nobel Prize in Physiology or Medicine; Wilkins' share recognised the contribution made by researchers (using X-ray crystallography) at King's College Londonto the determination of the structure of DNA.
In April 1953 Bragg accepted the job of Resident Professor (Fullerian Professor of Chemistry) at the
Royal Institutionin London. He proposed that the Royal Institution should perform some form of public service, and suggested a series of lectures to show experiments to schoolchildren. This idea was met with an enthusiastic response, and by 1965 20,000 schoolchildren were attending these lectures each year. He worked at the Royal Institution until his retirement in September 1966.
William Lawrence Bragg's hobbies included painting, literature and a life-long interest in gardening. When he moved to London, he missed having a garden and so worked as a part-time gardener, unrecognised by his employer, until a guest at the house expressed surprise at seeing him there.
Bragg received both the
Copley Medaland the Royal Medalof the Royal Society, and in 1967 was made a Companion of Honourby the Queen. He died at a hospital near his home at Waldringfieldon 1 July 1971.
Since 1992 the
Australian Institute of Physicshas awarded the [http://www.aip.org.au/content/bragg Bragg Gold Medal for Excellence in Physics] to commemorate Sir Lawrence Bragg (in front on the medal) and his father Sir William Bragg for the best PhDthesis by a student at an Australian university.
Victoria University of Manchester(1919–37)
* spouse = Alice Hopkinson (m. 1921)
* children = Stephen Lawrence, David William, Margaret Alice, Patience Mary
Biography: Hunter, Graeme. "Light Is A Messenger, the Life and Science of William Lawrence Bragg" ISBN 0-19-852921-X; Oxford University Press, 2004.
Ridley, Matt; "Francis Crick: Discoverer of the Genetic Code (Eminent Lives)", first published in July 2006 in the USA and then in the UK. September 2006, by HarperCollins Publishers; 192 pp, ISBN 0-06-082333-X; [This short book is in the publisher's "Eminent Lives" series.]
* [http://www.packer34.freeserve.co.uk/selectedTATAwebsites.htm] First press stories on D.N.A.
* [http://nobelprize.org/nobel_prizes/physics/laureates/1915/index.html Nobelprize.org - The Nobel Prize for Physics in 1915]
* Tactical Artillery Terms from World War I
* [http://www.johnmadjackfuller.homestead.com/fullerianprofessors.html Fullerian Professorships]
* [http://osulibrary.oregonstate.edu/specialcollections/coll/pauling/bond/people/bragg.html A collection] of digitized materials related to Bragg's and
Linus Pauling's structural chemistry research.
NAME=Bragg, William Lawrence
physicist, Nobel Prize for Physiology or Medicine
DATE OF BIRTH=March 31, 1890
PLACE OF BIRTH=
North Adelaide, South Australia
DATE OF DEATH=July 1, 1971
PLACE OF DEATH=
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William Lawrence Bragg — Sir William Lawrence Bragg (* 31. März 1890 in Adelaide/Australien; † 1. Juli 1971 in Waldringford bei Ipswich) war ein australischer bzw. britischer Physiker und Nobelpreisträger. Inhaltsverzeichnis … Deutsch Wikipedia
William Lawrence Bragg — Pour les articles homonymes, voir Bragg. Portrait de William Lawrence Bragg en 1915. Sir William Lawrence Bragg (31 mars 1890 à Adélaïde … Wikipédia en Français
William Lawrence Bragg — Conferencia Solvay de 1927: podemos ver a William Lawrence Bragg el tercero por la izquierda de la segunda fila, sentado entre Martin Knudsen y Hendrik Anthony Kramers, justo detrás de Marie Curie. Sir William Lawrence Bragg, OBE(* Adelaida,… … Wikipedia Español
William Lawrence Bragg — Sir William Lawrence Bragg (n. Adelaida, Australia, 31 de marzo de 1890 † Ipswich, Inglaterra, 1 de julio de 1971). Físico británico. Hijo del físico británico sir William Henry Bragg, en 1904, con tan solo 15 años, comenzó a estudiar en la… … Enciclopedia Universal
Physiknobelpreis 1915: William Henry Bragg — William Lawrence Bragg — Die britischen Physiker erhielten den Nobelpreis für »ihre Verdienste um die Erforschung der Kristallstrukturen mittels Röntgenstrahlen«. Biografien Sir (seit 1920) William Henry Bragg, * Westward (Cumbria, England) 2. 7. 1862, ✝ London 12 … Universal-Lexikon
William L. Bragg — William Lawrence Bragg William Lawrence Bragg, né le 31 mars 1890, décédé le 1er juillet 1971, fut un physicien qui a reçu le prix Nobel de physique, conjointement avec son père, Sir William Henry Bragg en 1915 pour leurs… … Wikipédia en Français
William Henry Bragg — Naissance 2 juillet 1862 Wigton, Cumberland, Angleterre Décès 12 mars … Wikipédia en Français
William Henry Bragg — Sir William Henry Bragg (* 2. Juli 1862 in Wigton, Cumberland; † 10. März 1942 in London) war ein britischer Physiker und Physik Nobelpreisträger. Inhaltsverzeichnis … Deutsch Wikipedia
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