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William Herschel
a British astronomer, discovered infra-red radiation (heat waves) -
Johann Ritter
German chemist discovered UV radiation -
James Maxwell
A British scientist, predicted the existence of continuous EM waves. -
Heinrich Hertz
German scientist discovered radio waves. -
Wihelm Roentgen
German physicist discovered x-rays. -
Henri Becquerel
French physicist discovered radioactive rays emitted by uranium. -
Marie Curie
discovered radium -
Paul Villard
Frenchman discovered gamma rays.