That's me, hollow cavity with a hole in my head.

-----Original Message-----
From: Grimer <[EMAIL PROTECTED]>

Talking of searches, I was interested to find that
a hohlraum is a piece of scientific equipment.

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Definition of hohlraum

A laboratory device to produce blackbody
radiation.  Consists of a closed metal tube,
blackened on the inside, with a narrow slit
cut into one of the flat ends.  On heating
the tube the radiation escaping from the
slit is virtually identical with that
expected from a blackbody.
============================================

One learns something new every day on Vortex  8-)

Frank Grimer


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