THE MAN THAT EXTENDED XRAY'S APPLICATION
WILLIAM LAWRENCE BRAGG
In 1912, William Lawrence Bragg, a 22-year-old physicist at Cambridge, worked out a simple relationship that changed how scientists looked at matter. The Nobel committee took notice of his work, and in 1915, Bragg shared the Physics prize with his father, William Henry Bragg, making him the youngest person ever to win the award in that category, at 25.
The honour came in the middle of the First World War, when Bragg was serving in the British army. There he helped develop sound ranging, a technique that located enemy artillery by timing the sound of their guns across an array of microphones. The work was militarily important, and it also shows the practical bent of his research.
Under Bragg's direction, the Cavendish Laboratory at Cambridge became the world's leading center for determining crystal structures. He used X-ray diffraction to work out the arrangements of ions in salts, the structure of silicate minerals, and the atomic layouts of metals and alloys. Crucially, he pushed the method toward biology. His laboratory pioneered protein crystallography, and it trained a generation of researchers, including Max Perutz and John Kendrew, who went on to map the structures of hemoglobin and myoglobin.
Bragg's legacy is real and wide, but it is also collective. The Cavendish became a kind of school, and its methods spread into chemistry, geology, metallurgy, and eventually pharmaceutical research, where knowing a molecule's shape guides the design of drugs. Bragg's law is taught in every introductory course on crystallography, and the field it launched underlies modern materials science, structural biology, and much of drug discovery. He helped establish a way of seeing the atomic world, and he trained people who extended it far beyond his own reach.
365 men who changed the world.
Kamikun John, Author 366 days of wisdom.
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