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