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- Harald Edens <edens_at_WEATHER-PHOTOGRAPHY.COM>
wrote:
> If the first-order interference bow is so much
> separated from the primary,
> and so intense, that would mean very small
> droplet sizes, and the bow would
> be more white I think. If I remember well, Les
> Cowley did some simulations
> of such a rainbow, with oblate droplets and
> also frozen raindrops.
>
> At the back of thunderstorms there can be
> drizzle (more round droplets due
> to surface tension) mixed with big droplets
> from molten hail/graupel
> (oblate due to air resistance). Thus there
> might be two distinct drop
> shapes in the downdraft and thus a separation
> of two rainbows (one round,
> one oval). That would indeed be at the top
> part of the rainbow, which is
> most prone to deformation due to non-round
> droplets. (The horizontal
> cross-section of oblate droplets is still
> circular, but the vertical
> cross-section is oval).
>
> Harald
Harald,
I did not think of there being oblong drops
mixed with small speroid drops I thought it would
be due to multiple scattering and as I said I
seen this at the back of a T-storm except it was
faint but if it were brighter I would of got some
pics but could not do any photos:(
Hows the school work going? I hope you will get a
break every once in a while so you can have fun
with the camera doing halo photography.
Best,
Michael
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