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Re: (meteorobs) Re: meteorobs-digest V3 #267
Hello Terry,
> Since red and green are complementary colors, I would hazard the guess that
> as he drove at night, he may have kept his eyes focussed on the same spot in
> front of his car for a while, burning in - so to speak - the green image on
> his retina. If he then shifted his view to the right slightly, the green
> LED readout would be taken out of his field of vision and he might then see
> an image of its complement, red.
thanks for your explanation, but I'm not sure whether it fully explains
the phenomenon. I don't feel like focussing on the same spot for a longer
time while driving, but like 'walking around' with my eyes instead.
Also, the LED does not really have time to 'burn' into the retina, since
it's on for 0.2s or so only, and the off for 1 or 2 s. So the LED is off
most of the time.
When I'm concentrating on the light I get the right color even if it's
away from the center of fov. However, if I think about something else
(there's plenty of time for that during a 7-hour drive at night :-) and
then by chance recognize the flashing light again (just like a meteor
which appears all of a sudden at the edge of your fov), then it often
becomes a red light.
Sirko
--
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* Dipl.-Inform. Sirko Molau * *
* RWTH Aachen, Lehrstuhl fuer Informatik VI * __ *
* Ahornstr. 55, D-52056 Aachen, Germany * " 2B v 2B " *
* * *
* phone: +49-241-8021615 * Shakespeare *
* fax : +49-241-8888219 * *
* email: molau@informatik.rwth-aachendot de * *
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* www : http://www.informatik.rwth-aachendot de/I6/Colleagues/molau *
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