* Astronomy

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RE: Rainbows

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Sundog 11.02.15

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'Quadruple rainbow' caught on film for the first time

Scientists have captured the first image of a "quaternary" rainbow - the fourth rainbow caused by the bending of light through water in the air.
This refraction frequently creates a visible second rainbow, but until now, no one had caught sight of the fainter third and fourth arcs that the process creates in a different part of the sky.
The first tertiary, or third, rainbow has only just been caught on film.
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