Archived posting to the Leica Users Group, 2011/01/28

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Subject: [Leica] An unusual visual phenomenon
From: benedenia at gmail.com (Marty Deveney)
Date: Sat, 29 Jan 2011 16:33:13 +1030
References: <AANLkTiktcTv-zGMt28scRocnMzhkKwscDxX8vRBpOL=7@mail.gmail.com> <1753CA02-8C08-461E-891D-1CC77B88F3DA@mac.com>
 
The paper is very likely to have optical brighteners in it that
fluoresce when exposed to UV - much more plentiful outside, even when
cloudy, than inside.

Marty

On Sat, Jan 29, 2011 at 5:15 AM, George Lottermoser <imagist3 at mac.com> 
wrote:
>
> On Jan 28, 2011, at 8:56 AM, Lawrence Zeitlin wrote:
>
>> Does anyone have an explanation?
>
>
> here's another fine explanation
> <http://www.cns.nyu.edu/~mjh/papers_pdf/Shapley-Hawken-conb12_425_02.pdf>
>
> Regards,
> George Lottermoser
> george at imagist.com
> http://www.imagist.com
> http://www.imagist.com/blog
> http://www.linkedin.com/in/imagist
>
>
>
>
>
>
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In reply to: Message from lrzeitlin at gmail.com (Lawrence Zeitlin) ([Leica] An unusual visual phenomenon)
Message from imagist3 at mac.com (George Lottermoser) ([Leica] An unusual visual phenomenon)