Hi everybody, On Mon, 1998-08-10 06:58:41 -0400, David Bogle / Architecture wrote: > ... > I learned that the light from > burning sodium, a "yellow" light, was not only in the middle of the visible > spectrum, but that its frequency or wavelength was the same dimension as the > diameter of a typical water droplet in fog! ... > ... > Of course, some of it > is reflected back, but overall the depth into the fog which one can see with > yellow light is greater. This is all perfectly right. If by some physical process you manage to produce yellow light in the first place, you'd probably be better off using this for fog lights. But current fog lights use tungsten type bulbs, and thus produce a more or less evenly distributed mix of all the wavelengths ("white" light). And then everything but the yellow part is more or less filtered out and as an unwanted but inevitable by-product the yellow part itself is reduced in strength, too. That's why I said use white glass and let the fog do the filtering. Most of the light comming back to you will then be in the yellow range, anyway. Sincerely Rainer ---------------------------------------------------------------------- | Rainer M Woitok | Phone: (+49-9131) 85-7811, -7031 | | Regionales Rechenzentrum | | | Friedrich-Alexander-Universitaet | Fax : (+49-9131) 30 29 41 | | Martens-Strasse 1 | Telex: d 629 755 tf erl | | D-91058 Erlangen | | | Germany | Mail: Woitok@RRZE.Uni-Erlangen.DE | ---------------------------------------------------------------------- |
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