On Aug 15, 2014, at 2:19 pm, Richard Womer <[email protected]> wrote:

> http://photo.net/photodb/photo?photo_id=17835663&size=lg
> 
> Now, the question: the sky is much darker outside the rainbow than
> inside it, but that wasn't apparent to the naked eye. Also, the
> diagonal dark streaks weren't apparent. Can anyone explain these
> artifacts?

http://hyperphysics.phy-astr.gsu.edu/hbase/atmos/ligsky.html

Very nice photo BTW.  The rough water reminds me of a character-building swim I 
had last year :)

Cheers,
Dave


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