Charles Abbot, US astrophysicist

Charles Abbot, US astrophysicist

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Caption: Charles Abbot (1872-1973), US astrophysicist, with bolometric apparatus during the Astrophysical Observatory Solar Eclipse Expedition, in 1900. Abbot researched the solar constant, which led him to invent the solar cooker, solar still and other solar inventions. He was the fifth secretary of the Smithsonian Institution, USA, from 1928-1944. A bolometer is a device for measuring the power of incident electromagnetic radiation via the heating of a material with a temperature-dependent electrical resistance.

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