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History
Bolometer
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A bolometer is a device for measuring radiant heat by means of a material having a temperature-dependent electrical resistance. It was invented in 1878 by the American astronomer Samuel Pierpont Langley.
Spiderweb bolometer for measurements of the cosmic microwave background radiation. Image credit: NASA/JPL-Caltech.
Spiderweb bolometer for measurements of the cosmic microwave background radiation. Image credit: NASA/JPL-Caltech.
Samuel Langley
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Samuel Pierpont Langley was an American aviation pioneer, astronomer and physicist who invented the bolometer. He was the third secretary of the Smithsonian Institution and a professor of astronomy at the University of Pittsburgh, where he was the director of the Allegheny Observatory.
Langley, circa 1895
Langley, circa 1895
Langley Aerodrome No. 6 at Posvar Hall, University of Pittsburgh
Langley Aerodrome No. 6 at Posvar Hall, University of Pittsburgh
Langley, right, with test pilot Charles Manly
Langley, right, with test pilot Charles Manly
First failure of the manned Aerodrome, Potomac River, Oct. 7, 1903
First failure of the manned Aerodrome, Potomac River, Oct. 7, 1903