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Sir William Henry Bragg

William Henry Bragg was a British Physicist with an interest in X-Ray Crystallography. His initial interests lay within Mathematics, but he soon became fascinated by Physics. 

Bragg held the Cavendish Chair of Physics at the University of Leeds from 1909, pursuing his interest in X-Ray Crystallography

In 1912 he discovered the Bragg law of X-Ray Diffraction, with the help of his son William Lawrence Bragg, which won both a Nobel Prize in 1915. The first paper on his findings was published under the title, 'Reflection of X-Rays by crystals'.

Bragg's law makes it possible to calculate the positions of atoms within a crystal the way in which an X-ray beam is diffracted by the crystal lattice. A plaque was placed in the Brotherton Library in honour of the  contributions Bragg made to the field of science. The plaque was unveiled in 1945.