pwl@fluke.UUCP (Paul Lutt) (02/17/84)
Someone in this group asked why fog lights are yellow. As I remember
it from college physics, the water drops that make up fog scatter
short wavelength light (blue) more than long wavelength light (red).
Normal headlights emit light over a wide range of wavelengths. Yellow
driving lights emit very little short wavelength light (blue), thus they
are not scattered as much by the fog.
Paul Lutt
John Fluke Mfg. Co, Inc.
Everett, WA
{uw-beaver,decvax!microsof,ucbvax!lbl-csam,allegra,ssc-vax}!fluke!pwl