Re: Cerenkov light

[andy everett <vze2qxq3@xxxxxxxxxxx>]

Sorcerer wrote:

> "Helmut Wabnig" <.... .-- .- -... -. .. --. @ .- --- -. DOT .- -> wrote in 
> message news:kibfp29p7b8i36hlcdvkh5jitkul6cb9qp@xxxxxxxxxx
> | There are not so many Cerenkov light fotos around,
> | while cleaning up my mess here I found an old picture.
> | If you are interested look at
> | http://www.members.aon.at/hwabnig/SeibersdorfReactor1967.jpg
> | That photograph dates back  1967, quality is not overwhelming.
> | There were about 10 meters of water downwards and on the surface
> | they had a small yellow rubber duck swimming because the water
> | is absolutely clear, surface almost invisible.
> | Unfortunately the duck had left the nest at the time of the photo.
> | Seibersdorf is near Vienna, Austria. The reactor is history.
> | w.
>
> Here's some much nicer pictures of Cherenkov radiation: 
>  http://www.ptialaska.net/~hutch/nlboat.jpg
>  http://www.aldebaran.cz/actions/2002_aurora/aurora/180.jpg
>  http://science.nasa.gov/spaceweather/aurora/images2003/31oct03/Zhu3.jpg
>  http://www.my-spot.com/images/wbf-aurora-1024.jpg

Nice pictures, different physics. See:

http://en.wikipedia.org/wiki/Aurora_%28astronomy%29