Hi Charles.

04-Oct-03 14:39:02, Charles Angelich wrote to Tom Walker


 CA> 1237d4e2f13b tech

 CA> Hello Tom -

 CA>>>> Color doesn't have a 'temperature' but light does have a
 CA>>>> wavelength.

 ->>> colour temperature is a term from the lighting industry refering
 ->>> to the black-body spectrum given at the specified temperature, or
 ->>> to lamps with an apparenlty similar temperature.

 TW>> It is also used in the Film Industry. It usualy referes to the
 TW>> "White" light temperature. And it is expressed in Deg K As an
 TW>> example my perfered Cool White Fluroscent Lamps are rated at
 TW>> 4100K Even most Home Incidencent Lamps have a "Temperature
 TW>> Rating" on the Box.

 CA> How many people look for 'temperature' when they purchase a bulb?


 CA> I realize that the decision to apply 'temperature' to color was
 CA> not made here at FIDO but reasonable people can grasp the fact
 CA> that there is no 'temperature' that would apply to color in any
 CA> meaningful way.

Ever hear of "black body radiation" ?

What about  red-hot, orange-hot, white-hot etc?
Working in a metal trade I expect you've had experice with that...

look up Black Body radiation in an encycliopaedia or a physics textbook.
that is exactly how colour temperatures are determined...

 -=> Bye <=-
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