Moire Fringes

By Suited and Booted

Here is a short snippet of film which uses the optical effect of Moire fringes in pieces of art. For more information about Moire fringes (in fact more information than any sane person would need) follow this link to Spectral Fringe...
The effect is produced by a red sheet of perspex with vertical lines etched in it swinging slowley behind and orange sheets with lines that are at a slight angle from the vertical. The blue sheet acts to increase the contrast.