" wrote in news:a14c49f3-2dc6-44ef-
:

On Mar 22, 5:31*pm, Bertie the Bunyip wrote:

You're always in the rainbown. Only difference is, when you are on
the
surface, the horizon always bisects it.

Bertie

Good point! As on the surface, one doesn't see the "whole
picture" :-)


Yeah, basically when you look at a rainbow you are at the tip end of a
cone. you are effectively at the center of projection and the sun is
always on a line extending from the center of the rainbow and the tip
of that cone. Tha's why you usually see them when the sun is relatively
low. The higher the sun is, the more of the rainbow is buried in the
earth. Since the cloud required is all below you when you;'re flying ,
there's no horizon to cut the arc...

BTW, if you take a camera with you regularly, take some colored filters
as well. I was lucky enough to have a yellow filter with me one day and
got a brilliant shot of one up in Canada. The filter increases the
contrast dramatically. They look kind of dull without it.


Bertie