William Herschel (1738-1822) German-born English astronomer investigating heating effect of infra-red (published 1800) In background is Herschel's 40ft reflecting telescop Artist's reconstruction Stock Photo - Alamy
File:Sir John Frederick William Herschel (1872) (14580147588).jpg - Wikimedia Commons
John Frederick William Herschel - Antiquariat INLIBRIS Gilhofer Nfg.
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Sir William Herschel
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Sir Frederick William Herschel, infrared light (IR) discoverer | NIRS Research
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sir frederick william herschel - Keyword Search - Science Photo Library
William Herschel - Wikipedia
Sir John Frederick William Herschel - Artvee
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