James Prescott Joule

✶December 11, 1818

†October 11, 1889

3 candles burning, 17 lit in all

About their life

James Prescott Joule was an English physicist. Joule studied the nature of heat and discovered its relationship to mechanical work. This led to the law of conservation of energy, which in turn led to the development of the first law of thermodynamics. The SI unit of energy, the joule (J), is named after him.

English physicist (1818–1889)

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Biography from the article James Prescott Joule on the English Wikipedia, available under CC BY-SA 4.0.