What causes an upside-down rainbow?

Answer

An upside-down rainbow is a rare phenomenon caused by refraction of sunlight through horizontally-oriented ice crystals. This usually occurs in cirrus stratus clouds rather than raindrops. It is also known as circumzenithal arc.
Q&A Related to "What causes an upside-down rainbow?"
This results in the sunlight bouncing off the ice crystals high in the atmosphere,
http://www.chacha.com/question/what-are-upside-dow...
A upside down rainbow means cheese or tacos.
http://wiki.answers.com/Q/What_does_an_upside_down...
One of the big benefits of inversion therapy, according to Inversion International, is back pain relief. The Mayo Clinic notes that in theory, hanging upside down allegedly relieves
http://www.ehow.com/list_6691455_benefits-hanging-...
All rainbows are circular or consist of part of a circle with the sun at the center (with the sun either in front or behind you. The rainbow when the sun is in front of you is caused
http://www.quora.com/What-causes-a-circular-rainbo...
About -  Privacy -  Careers -  Ask Blog -  Mobile -  Help -  Feedback  -  Sitemap  © 2015 Ask.com