On 8/8/05, Winsor Crosby <wincros@xxxxxxxxxxx> wrote:
>
> Maybe a black pinhole would suck the material out of the foil.
Hmmm, how would you work out the aperture though? I'm thinking that
you can't just figure it out as focal length divided by diameter since
the hole would actually suck light into it.
And how would adding a light funnel effect things (sorry, it's just
been way too long since I've seen anyone mention light funnels on the
list).
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