Rainbow Wallpaper, #2313

A Rainbow spans a continuous spectrum of colours. Traditionally, however, the sequence is quantised. The most commonly cited and remembered sequence, in English, is Newton's sevenfold red, orange, yellow, green, blue, indigo and violet. "Roy G. Biv" and "Richard Of York Gained Battle In Vain" are popular mnemonics.Rainbows can be caused by other forms of water than rain, including mist, spray, dew, fog, and ice. Moreover, Rainbows can have shapes other than a bow (arc), including stripes, circles, or even flames. (See circumhorizontal arc).A reflected Rainbow is produced when light that has first been reflected off a larger body of water then reflects inside raindrops before reaching the observer. [See http://www.eo.ucar.edu/Rainbows/rnbw8.gif]