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Charles Glover Barkla (1877-1944), British physicist. Barkla studied under Oliver Lodge at Liverpool University, and worked with J. J. Thomson at Cambridge University. He also worked in London and Edinburgh. After 1902, he mostly studied the newly discovered X-rays (Roentgen radiation). He studied X-rays passing through matter, discovering that X-rays, like light, could be polarised. It was his discovery that elements could be characterised by their X-ray spectrum that won him the 1917 Nobel Prize for Physics. This photograph is from the Bain News Service, one of the USA's earliest news picture libraries. The photographs date from the 1890s to the 1930s.
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