How Did Wilhelm Rentgen Contribute To The Formation Of Invisible Radiation

In 1895, Wilhelm Rontgen discovered x-rays. He observed that while operating a high-voltage discharge tube enclosed in thick black cardboard in his dark room, a paper plate covered on one side with barium platinocyanide would shine. Rontgen concluded that the discharge must be emitting a new form of invisible radiation that could escape the confines of the glass discharge tube and the surrounding covering. the unknown nature of radiation led him to name them x-rays(Maddox