Friday, December 3, 2010

Tangential Arc

On Dec 1, I saw for my first time, a tangential arc, an optical effect caused by the refraction of sunlight through ice crystals. Also visible, though barely perceptible, was a circumzenithal arc. The top right photo was manipulated to bring out the color of the circumzenithal arc.

I highly recommend the website Atmospheric Optics to learn more about this an other related phenomena.

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