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====

Rainbows at night:

Observations of lunar rainbows are rare. The Moon is bright enough to
produce a noticeable rainbow only when it is near its full phase.
Also, people are usually indoors at night, and when they do step
outside it is often into a light-polluted environment, which rules out
any chance of seeing a lunar rainbow. Even when conditions are
favourable, few people would notice a lunar rainbow because it is too
dim to activate colour vision and therefore appears white.

====


Note, that like the Sun, to see a rainbow at night you would have to
have your back to the Moon, and a line connecting the Moon and your
head would point to the centre of the bow.


Pat




On Apr 19, 2008, at 7:21 PM, Margaret E.Millard wrote:


<excerpt>out here along the shore often when there is a moon shining
through either wispy low cloud or fog/mist there is quite often a
moray or rainbow sometimes more clearly visible than others. I find my
glasses, they have the sun protection built in,  adds to it.

Marg Millard, White Point, Queens

http://margmillard.ca

----- Original Message ----- From: "David & Alison Webster"
<<dwebster@glinx.com>

To: <<naturens@chebucto.ns.ca>

Sent: Saturday, April 19, 2008 11:20 AM

Subject: Re: [NatureNS] rainbow at night?



<excerpt>Northern Lights ?

DW


bdigout@seaside.ns.ca wrote:


<excerpt>As we arrived home this evening  in Samsonville at 9:00 P.M.
there was a

light arc in the nnw, going from the horizon up about 20 degrees and
back

to the horizon.  There was a light mist at the time, but also a full
moon.

Does anybody have an idea what it might be?

Billy


</excerpt>

</excerpt>


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Patrick Kelly

Director of Computer Facilities

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Faculty of Architecture and Planning

Dalhousie University

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Canada                                 Canada

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