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Capital Adventures
March 17th, 2010
07:51 pm
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Two pots of gold for St Pat's.

Two full bows, and supernumerary bows as well! The squally southerly weather has its upside.


(5 comments | Leave a comment)

Date:March 17th, 2010 12:23 pm (UTC)
Hmm. proves the air quality there is pretty good... you don't get that kind of sharpness to supernumerary bows [and two of them!] with high levels of particulate pollution.
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Date:March 18th, 2010 07:47 am (UTC)
Supernumeraries are an interference effect and occur when you get fine, even raindrops - which tallies with the bright, even rainbow. Small drops are spherical and produce rainbows in any direction, large ones flatten and become disc-like as they fall and only produce vertical sections of rainbow. The fading at the top in the first picture is due entirely to the polariser I used.

I'd expect any particulate to be washed out quite rapidly in a rainstorm such as this.
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Date:March 17th, 2010 01:12 pm (UTC)
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Date:March 18th, 2010 07:48 am (UTC)
Ain't it just...
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Date:March 23rd, 2010 08:54 am (UTC)
Applause! :)
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