Circumzenithal Arc
Taken by Ender Gökçebay on November 1, 2017 @
Leuven / Belgium
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Camera Used: Canon Canon EOS 500D
Exposure Time: 1/250
Aperture: f/10.0
ISO: 100
Date Taken: 2017:11:01 15:42:36
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Details:
A circumzenithal arc (sometimes known as Bravais' arc) is a type of Halo. They are formed when sunlight refracts through horizontal ice crystals at such an angle that the light enters the crystal through its flat top face and exits through a side prism face causing the distinctive upside-down rainbow effect. They are commonly associated with Cirrus clouds where ice crystals readily form.
In my photo the arc was produced by two different airplane contrails, so looks like it's broken.
Photographer's website:
No URL provided.
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