Becquerel ray Grenz ray Roentgen ray X radiation X ray actinic ray actinism alpha radiation alpha ray anode ray atomic beam atomic ray beam beam of light beta radiation beta ray canal ray cathode ray cosmic radiation cosmic ray cosmic ray bombardment electron emission gamma radiation gamma ray gleam infrared ray infraroentgen ray invisible radiation leam nuclear rays patch pencil photon positive ray radiation ray ray of light ribbon ribbon of light solar rays streak stream stream of light streamer ultraviolet ray violet ray