1 jan 1885 ano - Wilhelm Roentgen produced an x-ray from a Crookes tube and Crookes himself believed that electrically charged atoms were represented as waves. Some thought that they were a new kind of electromagnetics. For example, the sun, those waves of radiation fall down on the earth which nobody has ever known before. Until today where our research has advanced to extend where we know where this electromagnetics comes from. Most likely called UV lights. (Linha do tempo)