Rare “Rainbow” Over Idaho
Posted on June 20, 2006 Comments (2)
Rare “Rainbow” Spotted Over Idaho by Victoria Gilman:
When light enters through a vertical side face of such an ice crystal and leaves from the bottom face, it refracts, or bends, in the same way that light passes through a prism. If a cirrus’s crystals are aligned just right, the whole cloud lights up in a spectrum of colors.