Alan White wrote:
On 25 Feb 2005 18:06:43 -0800, "Tudor Hughes"
wrote:

That's absolutely brilliant, Alan. It shows very clearly how
much more light is reflected inside the bow compared with outside
it.
A bit of ray-tracing shows why.

blush

Don't get too carried away. It was taken through a double glazed
window and your ray may be tracing the very faint image of my
reflection :-)

--
Alan White
Twenty-eight miles NW of Glasgow, overlooking Loch Goil and Loch Long
in Argyll, Scotland.
Web cam, http://www.windycroft.gt-britain.co....her/kabcam.htm
Web site, http://www.alan.lesley.ukgateway.net

I can't see a face there. :-) What I meant by ray tracing was
following the path of a ray of sunlight through a raindrop while
varying the angle at which it enters. It's a bit laborious but shows
that more light is reflected at angles less than the radius of the
rainbow compared to greater than that radius. The greatest
concentration is at the radius itself which is why the rainbow is
there. A great picture.

Tudor Hughes, Warlingham, Surrey.