"Alan LeHun" wrote in message
.. .

You wouldn't call the water going into a bucket, drippy water, and the
water coming out it, leaky water, and then try and claim that drippy
water and leaky water are somehow different types of water.

I would call them different if they were at different temperatures. If
the drippy water was cold water (colder than that in the tank), then
the temperature in the tank would fall. The leaky water would not
change the tank temperature, since it would be at the tank temperature.
However, its rate of flow would affect the rate at which the tank
temperature fell.

It is the same with radiation and objects, but of course two objects
(hot and cold) interchange radiation much as if you interconnected
two tanks of hot and cold water.

Cheers, Alastair.