Astro*Dictionary by Michael Erlewine
1 article for "Ritter, Johann Wilhelm"
Ritter, Johann Wilhelm [Astro*Index](1776-1810) German physicist.
In 1801, he discovered Ultraviolet Radiation which, although invisible to the eye, could be detected by photographic means.
See also:
♦ Electromagnetic Spectrum
Astro*Index Copyright © 1997 Michael Erlewine