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06.25.12 News
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Picture of the Day

Sky-high Double Dutch

A double rainbow graces the sky. When direct sunlight strikes falling rain, a rainbow is seen at a point directly opposite the sun. A double rainbow occurs when some of the light entering the raindrop is refracted into its component colors, reflected off the back interior wall of the drop, and then refracted again as it exits the drop. The dark area in between the two rainbows is called Alexander's band.

Image credit: ©University Corporation for Atmospheric Research; photo by Carlye Calvin