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British physicist William Lawrence Bragg (1890-1971, left) in front of a selection of rock and mineral specimens with Max Laue (1879-1960) and Isidor Fankuchen (1904-1964). Bragg worked on the diffraction of X-rays by crystals (1912) and developed Bragg's Law concerning this diffraction. With his father, William Henry Bragg, he invented the technique of X-ray crystallography and they shared the 1915 Nobel Prize in Physics for this work. Laue had the idea that crystals would provide a small enough mesh to diffract X-rays, and it was Laue's mathematical description that led to later work by the Braggs. For this discovery, Laue won the 1914 Nobel Prize for Physics.
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