Bragg , Sir William Lawrence


Bragg , Sir William Lawrence
(1890–1971) British physicist
William Lawrence Bragg was the son of William Henry Bragg. Born in Adelaide, Australia, he was educated at the university there and at Cambridge University, where he became a fellow and lecturer. After the war, in 1919, he was appointed professor of physics at Manchester University. He succeeded Ernest Rutherford in 1938, after a short period in 1937 as director of the National Physical Laboratory, as head of the Cavendish Laboratory and Cavendish Professor at Cambridge. Finally, in 1953, he became director of the Royal Institution, London, a post his father had held previously and which he held until his retirement in 1961.
Success came very early to Bragg, who shared the Nobel Prize for physics with his father in 1915. Following Max von Laue's discovery of x-ray diffraction by crystals in 1912, Lawrence Bragg in the same year formulated what is now known as the Bragg law:
nλ = 2dsinθ
which relates the wavelength of x-rays (λ), the angle of incidence on a crystal θ, and the spacing of crystal planes d, for x-ray diffraction. n is an integer (1, 2, 3, etc.).
Bragg collaborated with his father in working out the crystal structures of a number of substances. Early in this work they showed that sodium chloride does not have individual molecules in the solid, but is an array of sodium and chloride ions. In 1915 the Braggs published their book X-rays and Crystal Structure.
Lawrence Bragg later worked on silicates and on metallurgy. He was responsible for setting up a program for structure determinations of proteins.

Scientists. . 2011.

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  • BRAGG, Sir William Henry (1862-1942) — physicist son of Robert John Bragg, a sea captain who had become a farmer, and his wife Mary Wood, daughter of a clergyman, was born at Stoneraise Place, Wigton, Cumberland, on 2 July 1862. He was educated at King William s College, Isle of Man… …   Dictionary of Australian Biography

  • Bragg, Sir William — ▪ British physicist in full  Sir William Henry Bragg   born July 2, 1862, Wigton, Cumberland, Eng. died March 12, 1942, London  pioneer British scientist in solid state physics (solid) who was a joint winner (with his son Sir Lawrence Bragg… …   Universalium

  • Bragg, Sir William (Henry) — (2 jul. 1862, Wigton, Cumberland, Inglaterra–12 mar. 1942, Londres). Científico británico, pionero de la física del estado sólido. Con su hijo (William) Lawrence Bragg (n. 1890–m. 1971) compartió en 1915 el Premio Nobel por su investigación en la …   Enciclopedia Universal

  • Bragg, Sir William (Henry) — (b. July 2, 1862, Wigton, Cumberland, Eng. d. March 12, 1942, London) British scientist, a pioneer in solid state physics. With his son (William) Lawrence Bragg (1890–1971), he shared a 1915 Nobel Prize for research on the determination of… …   Universalium

  • Bragg , Sir William Henry — (1862–1942) British physicist Bragg s father was a merchant seaman turned farmer. William Henry Bragg was born in Westwood in England and educated at a variety of schools before going as a scholar to Cambridge University. He graduated in 1884 and …   Scientists

  • Bragg, sir William Henry — ► (1862 1942) Físico británico. Fue premio Nobel de Física en 1915, compartido con su hijo William Lawrence, por sus trabajos con los rayos X sobre la estructura de los cristales …   Enciclopedia Universal

  • 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 — 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


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