There is no such thing in Physics as "cold" - just lack of heat. Everything
radiates heat, even a block of ice, the intensity of heat radiation being
proportional to the 4th power of the Absolute Temperature (Stefan-Boltzmann
Law). So if a body is in cold surroundings it radiates more heat than it
gets back and so is cooled. You could look at that as "cold radiation"; all
this argument is really just one of semantics.

Ian Bingham,
Inchmarlo, Aberdeenshire.

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Thanks Ian,

Some sense at last :-)

Cheers, Alastair.