Actually, very bright rainbows tend to develop double or triple bows,
but also you are simply seeing more of the blue band that tends to be
washed out by the blue of the background sky (which is why you see more
colors in the part of the bow that has a white cloud background).
"Michael M. Butler" wrote:
>
> I have seen NIR laser light *diffuse reflections*. I don't make a habit
> of it, but I can. 830 nm for sure, 850-860 possibly (that diode was not
> well characterized). I would call it "dull" rather than dim, although it
> is that, too.
>
> I can also see what I think is a UV tail in very bright rainbows, though
> I am not absolutely sure it's not some refringence effect or something.
>
> Eugene.Leitl@lrz.uni-muenchen.de wrote:
>
> > In fact some (imo rather foolish) people have purported
> > to see a very dim red when looking into an operating NIR laser diode
> > (don't do it at home, kids), at least for a while. I'm told an UV LED
> > (also not healthy to look into) also projects a sort of sickly
> > purplish glow (and making mineral-filler paper fluoresce),
> <snip>
> > (That sunrise is sooo ultraviolet... wow, man).
> <snip>
> > Say, that's a rather large soapbox.
>
> And an excellent one! 'gene, you rarely disappoint.
This archive was generated by hypermail 2b30 : Mon May 28 2001 - 09:50:32 MDT