Sir Joseph John Thomson, also known as J.J. Thomson, was a British physicist who was born on December 18, 1856 in Cheetham Hill near Manchester, England. Thomson’s first college he enrolled in was at the Owens College in 1870, and joined Trinity College, Cambridge in 1876 as a minor scholar. There at Trinity College he remained a member for the rest of his life. First as a lecturer in 1883, and then as a master in 1918. Thomson’s main interest was in the atomic structure. Which eventually won him a Nobel prize in physics in 1906.
Thomson began his investigation of the mysterious rays which occurred in a tube when electricity was passed through a vacuum. These rays were called cathode rays, because they seemed to come from a negative e
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