Ian Witham wrote:

> I think someone in the group doing high-school science should be kind enough
> to conduct a little experiment for Tom....  As for me, I believe there would
> be no shadow of the flame (certainly not a purple shadow) just the shadow of
> turbulated air (but no suggestions on how to do that sorry).

I haven't checked but I don't see how a flame could have a shadow other than the
turbulated air. Fire is just energy, no? Well, the stuff burning/smoke, but in
this case just clean-burning gas and oxygen so no noticeable shadow from that.

As for the flame itself, I think if you have a real good one going there should
be a more definite, more saturated inner cone/parabola with a thin aura around
it, but depending upon what's behind it it can show up very well or almost not
at all. (And man did we have a hot one going on Wednesday!)

--
David Fontaine  <dav### [at] faricynet>  ICQ 55354965
My raytracing gallery:  http://davidf.faricy.net/

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