biography
| name: |
Townsend, Sir John (Sealy Edward)
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| sex:
| male
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| lived:
| (1868–1957)
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| biography:
| Physicist, born in Galway, Co Galway, W Ireland. He became a demonstrator at the Cavendish Laboratory, Cambridge, under Sir J J Thomson, before becoming professor of physics at Oxford (1900). He contributed to the theory of ionization of gases by collision, and calculated in 1897 the charge on a single gaseous ion. He was knighted in 1941. |
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