On 2015-08-06 14:52:07 +0000, Alastair said:

Cold radiation does exist.

Cheers, Alastair.

I am not arguing or taking sides (hard to believe, I know) but please
consider this.

Place an ice cube on a suitable surface (use tongs to protect your body
heat) and move your forefinger near to it until you feel the cooling
effect. This is caused by:

a) The cold is radiating from the ice cube, causing your fingertip to
feel less warm than before, or

b) The warmth from your finger is radiating towards the cooler ice
cube, causing your fingertip to feel less warm than before.

Then try this.

Put a kettle on to boil and move a fingertip towards the body of the
kettle until you feel the heat (taking great care not to burn
yourself). This is caused by:

c) The heat is radiating from the kettle, causing your fingertip to
feel warmer than before, or

d) The relative cold from your finger is radiating towards the kettle,
causing your fingertip to feel warmer than before.

The explanations for each outcome must agree, in other words you may
choose (a) and (d) as the answer or (b) and (c). Other combinations
would be self cancelling and therefore incorrect.

No advanced physics, no references to abstruse web sites, just a simple
experiment that we can all do and probably have done by chance many
times.

--
Asha
nature.opcop.org.uk
Scotland