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Thursday, March 18, 2010

 

Unexpected Rainbows (Part 13)

Correspondent Alan Garde pointed me to this cool unexpected rainbow at Spaceweather (you will have to scroll down to see it, but a high resolution image is here). Not only has the glass of the bus stop acted as a prism to produce a spectrum, but you can also see the Fraunhofer lines in the spectrum.

I've never seen this before, maybe you need a particular intensity of spectrum to see them, but I'm going to be scrutinizing unexpected rainbows very closely now.

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