kilo*man, Ann Arbor wrote:Directly behind the photographer are two (or more) small apertures which are close together and through which a bright light is shining (perhaps the sun?). The apertures acts as lenses to focus the image of the bright light upon the surface that is being photographed. Thus the image of the light source is brighter than the surrounding dimly lit surface. The color rings are due to the diffraction patterns from the apertures interfering with one another and producing maxima for each wavelength.
RJD in Dallas wrote:A circular diffraction pattern. Instead of sunlight, the source of light is the camera flash.
raze wrote:What I did not originally guess about was the medium the hole is in. After reading someone's posting concerning visqueen (plastic) I'm convinced that the hole is in a transparent, or translucent medium.
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