Herschel Infrared Light Experiments #2 Photograph by Science Photo Library

Herschel Infrared Light Experiments #2

by Science Photo Library

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Title

Herschel Infrared Light Experiments #2

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Science Photo Library

Medium

Photograph - Photograph

Description

Herschel infrared light experiments, artwork. In 1800, the British astronomer William Herschel (1738-1822) carried out a series of experiments that led to his discovery of infrared light. Firelight (left) is being focused through a lens (centre). Thermometers (at right) were placed at the correct distance to detect the temperature increase due to the focusing of infrared light. The non-focused light from the fire has been blocked by the shield in front of the thermometers. This artwork (Plate XV) is the eighth of ten illustrating the third of Herschel's four papers on this topic (read 15 May 1800), published in volume 90 of 'Philosophical Transactions' (Royal Society of London).

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September 16th, 2018

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