Erik Reuter wrote:
> 
> On Mon, Sep 29, 2003 at 12:02:26AM -0400, David Hobby wrote:
> 
> > Betting that dark glasses really are "dark" at all reasonable
> > wavelengths.
> 
> You'd lose that bet. Most dark tinted glass passes light above about
> 1000-1100nm.

        Oh.  Good to know.  Just to clarify, that's around 10,000
Angstroms, and "above" means "of longer wavelength"?
        So you think that would be the method?  Just pick a wavelength
where glasses/contacts are probably transparent, and work there.

                                ---David
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