amber/yellow lights

[Paul Ivsin]

----- Original Message -----
From: "David Bowie" <db.list at PMPKN.NET>


Well, if you're moving *really* fast, i *guess* the blue shift would make it
look orange...

David, wondering how fast you'd have to go to make it look green
-----

FWIW, from http://www.fourmilab.ch/cship/doppler.html --

"There's an apocryphal story about the physicist who tried to beat a ticket
for running a red light by telling the judge that at the speed he was
approaching the signal, the red light was Doppler shifted so it appeared
green. The judge pondered this for a few minutes and tore up the red light
ticket. Then, seeing as the physicist would have to be driving about a
quarter of the speed of light to see a red signal as green, the judge fined
him 269 million dollars for speeding, one dollar for each kilometer per hour
over the limit."

Paul

...   ...   ...
Paul Ivsin
paul at ivsin.com