What did Sir William Herschel discover in 1800?
A) Ultraviolet rays B) Infra-red radiation C) X rays D) Microwaves
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Answer:
Sir William Herschel discover B) infra-red radiation in 1800.He was born in Hanover, Germany (1738-1822).
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sir William herschel discovered b) infa red radiation in 1800
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