Heidelberg, Germany/heidelberg431
Previous | Home | NextThese are the colors of flames with various salts -- (left to right) sodium, barium, and potassium, which can identify the respective element. Kirchhoff's idea was to use a prism to break up the colors into a spectrum which would allow one to distinguish elements of one color -- such as calcium, lithium, strontium, and rubidium, all of which produce a red spectrum.
