Later On

A blog written for those whose interests more or less match mine.

Fire rainbow

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Photo credit: Christa Harbig

I’m sure that in earlier ages if something like this were seen, few would accept it as a merely meteorological phenomenon. It would be made to serve as a great portent of something people wanted or of something they feared. Found on Facebook:

“Fire Rainbows” or “rainbow clouds” are neither fire, nor rainbows, but are so called because of their brilliant pastel colors and flame like appearance. Technically they are known as circumhorizontal arc – an ice halo formed by hexagonal, plate-shaped ice crystals in high level cirrus clouds. The halo is so large that the arc appears parallel to the horizon, hence the name.
Brightly colored circumhorizontal arc occur mostly during the summer and between particular latitudes. When the sun is very high in the sky, sunlight entering flat, hexagon shaped ice crystals gets split into individual colors just like in a prism. The conditions required to form a “fire rainbow” is very precise – the sun has to be at an elevation of 58° or greater, there must be high altitude cirrus clouds with plate-shaped ice crystals, and sunlight has to enter the ice crystals at a specific angle. This is why circumhorizontal arc is such a rare phenomenon.

Written by Leisureguy

18 August 2021 at 7:18 pm

Posted in Daily life, Science

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