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infa-red Radiation is discovered
William Herschel, a British astronomer, discovered infra-red radiation (heat waves). -
UV radiation is discovered
German chemist Johann Ritter discovered UV radiation. -
Prediction of continuous EM waves
James Maxwell, a British scientist, predicted the existence of continuous EM waves. -
Radio waves are discovered
German scientist Heinrich Hertz discovered radio waves. -
X-rays are discovered
German physicist Wihelm Roentgen discovered x-rays. -
Radioactive Rays are proved to emit uranium
French physicist Henri Becquerel discovered radioactive rays emitted by uranium. -
Radium is Discovered
Marie Curie discovered radium. -
Gamma Rays are discovered
Frenchman Paul Villard discovered gamma rays.