Tuesday, September 22, 2015

SUPERNUMERARY RAINBOW

I hope you are looking at the sky now and then because there is a lot of crazy stuff going on up there. The other day i got a picture of another rare rainbow, I got a picture the rare SUPERNUMERARY RAINBOW!!!!!!! It's best to only write it in capital letters.

From a random rainbow science website it is described as follows, and has a historic footnote:

"Occasionally, another beautiful and striking rainbow phenomenon can be observed, consisting of several faint rainbows on the inner side of the primary rainbow, and very rarely also outside the secondary rainbow. They are slightly detached and have pastel color bands that do not fit the usual pattern. They are known as supernumerary rainbows, and it is not possible to explain their existence using classical geometric optics."
"The alternating faint rainbows are caused by interference between rays of light following slightly different paths with slightly varying lengths within the raindrops. Some rays are in phase, reinforcing each other through constructive interference, creating a bright band; others are out of phase by up to half a wavelength, canceling each other out through destructive interference, and creating a gap. Given the different angles of refraction for rays of different colors, the patterns of interference are slightly different for rays of different colors, so each bright band is differentiated in color, creating a miniature rainbow. Supernumary rainbows are clearest when raindrops are small and of similar size. The very existence of supernumary rainbows was historically a first indication of the wave nature of light, and the first explanation was provided by Thomas Young in 1804."

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