Science & technology

Birth of Joseph John Thomson

18 December 1856

Joseph John Thomson was born on 18 December 1856 in Cheetham Hill. A British physicist, Thomson discovered the electron in 1897 through experiments with cathode rays, showing that atoms are not indivisible but contain much smaller negatively charged particles. For this work he received the Nobel Prize in Physics in 1906. He later developed early forms of mass spectrometry and proposed the so-called plum pudding model of the atom. Long associated with the Cavendish Laboratory in Cambridge, he served as its director and as Master of Trinity College, and several of his students and even his own son, George Paget Thomson, also won Nobel Prizes.

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This moment belongs to the Industrial era (1760 CE to 1914 CE), steam, factories and revolutions. You can also browse everything in the 19th century.