Re: how do you make WHITE?

[brian whatcott <inet@INTELLISYS.NET>]

At 11:29 3/7/99 +0100, Ludwik wrote:
> > ... If you take a zillion identical small
> > quartz spheres and arrange them in a regular lattice like a crystal,
> > ... If the
> > lattice really is perfect, the scattering is coherent.  The coherent
> > forward scattering reconstructs the incoming wave perfectly...

> How large is the radius of each quartz sphere? My prediction is that
> spheres whose radia are 1 mm, for example, will not "reconstructs
> the incoming wave perfectly". Are you referring to a real experiment
> or to gedankening?
...
> Ludwik Kowalski
While not having a satisfactory answer to Ludwik's size question,
I DO recall that one method adopted for measuring particle
contamination in liquids was to measure the forward scattering
of a laser beam in e.g wine.
More or bigger particles led to more scattering, I seem to recall.

Brian

brian whatcott <inet@intellisys.net>
Altus OK