Ultraviolet quickly than violet light itself. He called them "oxidizing rays" to emphasize chemical reactivity and to distinguish them from "heat rays", discovered the previous year at the other end of the visible spectrum. The simpler term "chemical rays" was adopted shortly thereafter, and it remained popular throughout the 19th century, although there were those who held that these were an entirely different sort of radiation from light (notably John William Draper, who named them "tithonic rays"). The terms chemical rays and heat rays were eventually dropped in favor of ultraviolet and infrared radiation, respectively. In 1878 the sterilizing effect of
Ultraviolet (Light My Way) Ultraviolet (Light My Way) "Ultraviolet (Light My Way)" is a song by Irish rock band U2 and the tenth track from their 1991 album "Achtung Baby". Ostensibly about love and dependency, the song also lends itself to religious interpretations, with listeners finding allusions to the Book of Job and writers finding spiritual meaning in its invocation of the light spectrum. The song's composition and recording incorporate both serious and throwaway elements, in keeping with the rest of "Achtung Baby". While not released as a single, the song has appeared in two films and a U2 business venture was named after