science p2 By taylormarierobertss 1776 William Herschel dicovered infrared radiation 1801 Johann Ritter discovered UV radiation 1873 Heinrich Hertz discovered radio waves 1885 James Maxwell predicted the EM waves 1895 Wihelm Roentgen discovered x-rays 1896 Henri Becquerel discovered radio rays emitted by uranium 1898 Marie Curie discovered radium 1900 Paul Villard discovered gamma rays