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