In a message dated 6/22/99 2:23:25 PM EST, jans@xxxxxxxxxxx writes:
<< I don't think this is quite right. All bulb filaments are tungsten, but in
a normal, evacuated bulb, the tungsten boils away at relatively low
temperatures. Adding pressurized halide gas causes tungsten to stay in
place (actually, I think it causes tungsten gas to re-plate back onto the
filiment), thus allowing it to operate at higher temperatures.
But this is just nit-picking -- sorry, George! Everything else George said
sounded right on, >>
YES, you are correct, Jan. I was trying to shorten my explanation,
and lost some important pieces in the shortening! I tried to simplify things
re: higher temperature, and eliminated the part about the tungsten
re-depositing itself on the filament.
Regards,
George S.
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