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|  » Stats |
Members: 50,173
Threads: 82,386
Posts: 853,538
Top Poster: glsammy (15,069)
| | Welcome to our newest member, shipin | |  | | 
22-10-2006, 02:19 PM
|  | Frozen | | Join Date: Jun 2006 Location: Mendip Dist. Somerset
Posts: 739
| | | Re: 2 types of rainbow effect
When I saw over in Sicily, Dec.2002, staying with a lady friend, who was a photographer & vulcanologist, we saw, for 3 days running, a complete sundog & on the night of the Full Moon, a complete Moondog. Dogs are completely circular, around sun or moon. This was all thanks to the 2002/3 eruption of Etna. I have prints of the sun & moondogs which I took, if I can get them scaned, I'll post. As none of my pics have been excepted so far we'll just have to wait & see if the mods relent. |
22-10-2006, 04:17 PM
| | Member of the Wild Empire | | Join Date: May 2006 Location: Hartley, Kent
Posts: 257
| | | Re: 2 types of rainbow effect
I've noticed that if I look at the reflection sun in my pond on a hazy day I can often see the rainbow effect, it could be something to do with the polarization of the reflected light. |
23-10-2006, 08:14 AM
| | Commander of the Wild Empire | | Join Date: Apr 2005
Posts: 1,389
| | | Re: 2 types of rainbow effect
Quote
Dogs are completely circular, around sun or moon.
Endquote
The circles are haloes (or parhelic circles), sundogs are small sections of halo.
If the haloes you saw were due to Mount Etna, they were presumably caused by dust in the upper atmosphere, and not to ice crystals, and a different effect entirely (unless the dust particles were acting as nuclei for the ice crystals. I should like to see the pictures - hope you can get them scanned.
Quote
I've noticed that if I look at the reflection sun in my pond on a hazy day I can often see the rainbow effect, it could be something to do with the polarization of the reflected light.
Endquote
Any chance of a photograph? I'm not sure what effect you are seeing here. By the way, be careful looking at even a reflection of the sun, and don't use a viewfinder camera to photograph it!
henrya
henrya
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23-10-2006, 09:10 AM
| | Frozen | | Join Date: Jun 2006 Location: Mendip Dist. Somerset
Posts: 739
| | | Re: 2 types of rainbow effect
Thanks, Henrya, a native told me they were dogs, when we were up on Etna. | | | |
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