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Michael & folks,
Michael your interference picture gallery is impressive, thank you
of the web page tip. I am not sure if you are still suggesting that
interference is the route to the twinned bow puzzle as presented by
http://www.meteoros.de/unbe/regen.htm (particularly the two lowest
pictures by Kühne at that page, scroll down to the amazing
"Ungewöhnlicher Regenbogen am 03. Juni 2002").
I for one of us ...I still don´t believe the standard interference is
anywhere near the solution. Why so? Follows four reasons.
- In the Benjamin Kühne´s "twinned bow" the two bows
seem to MERGE at one end. In standard interference pattern as in your
pictures the bows are in essence more or less parallel, more or less
concentric. We have seen nothing in the normal interference pictures
that would really look as crazy as in Kühne´s truly eyebrow-raisingly
anomalous case.
- In the Kühne´s pictures the bows are surprisingly similar as to their
width and intensity. Whereas in typical interference pictures as in your
beautiful, well reproduced experiment gallery the first interference bow
is clearly a/ narrower than the main bow and b/fainter than the main bow.
- Les Cowley´s simulation looks like a good match and hence might be a
good candidate to explain the phenomenon literally without involving
any interference at all.
- Cowley´s earlier arguments about the too large seperation between the
twinned bows by Kühne. According to Les this fits badly, if at all to
physical interference (unless its a white fog bow). In your pictures just
as in typical intereference the bows are (in relative sense) VERY near
each other, also in the first picture of second row, where the bows hit
the corner of the picture (hence are most effected by lense distortion?)
All the best, Marko
On Tue, 20 May 2003, Michael Ellestad wrote:
> Marko,
> I have done some experiments with a garden hose
> once to see how many interfernce arcs could be
> possible and the experimant gave good results,
> like the interference arcs look they have certain
> colors washed out and the inner most of the
> interference arcs were red and green but in one
> photo I got they were not circular because the
> larger drops fall down faster while the lighter
> ones still hang in the air for a while causing
> wider interfence bands. I have webpage and the
> URL is:
>
> www.geocities.com/bowlturner/my_weatherpics.html
>
> Marko I don't know if Jarmo told you abut me but
> I am also a halo observor and I live in the USA
> and when ever I get a big display I report it to
> FHON I have always been into atmospheric optics
> and in 2000 for I got what I thought was a double
> tangent arc and I found out later it was upper
> tangent arc with sunvex parry.
>
>
> The interference bows page is under rainbows,
> click the rainbows link on my front page then
> scroll down till you see Rainbow Interference
> then click on photo gallery and you will find the
> first photo showing the interfernce arcs tapering
> away.
>
> All the best,
> Michael
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