Figure: Colour spectra of elements undergoing electrical discharge excitation

Simulated gas discharge spectra are synthesized by a Java Applet. Examples spectra are given for Hydrogen, Helium, Oxygen, Carbon, Nitrogen, Neon, Magnesium, Silicon, Sulfur, Iron, Aluminum, Calcium, Argon, Sodium, Krypton, Xenon and Mercury.

Credit: This Applet was created by John Talbot. The data for these spectra is courtesy of the Astronomical Data Center, and the National Space Science Data Center through the World Data Center A for Rockets and Satellites. The web page (see below) was written by J.Köppen.

http://astro.u-strasbg.fr/~koppen/discharge/index.html