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Re: sun's spectrum

I was not aware of a line radiator in an optical pyrometer. I thought it was
just a matter of matching two continuous sources??

On Fri, 30 Jan 1998 19:33:27 -0800 Leigh Palmer said:
The condition for extinction of an emission (or absorption) line is equality
of the temperature of the continuum radiator and that of the thermally excited
line radiator.

...and that, by the way, is the principle of
operation of an optical pyrometer.

Leigh