Deborah Berebichez explica el brillo colorido de los diamantes y varios fenómenos más relacionados con refracción de la luz en http://askdoctordebbie.com/2011/07/17/on-rainbows-and-diamonds/
Copio también el "teaser":
Daily Science » Blog Archive » On Rainbows and Diamonds
askdoctordebbie.com
Yesterday a quick rainstorm came through. Shortly after it passed, a beautiful rainbow appeared in the sky, a perfect arc that touched down somewhere this side of the distant hills. While my 2-year-old nephew thought the rainbow very pretty, he would have none of the explanation, so I offer it here...
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