On 06/10/2020 01:30:10, The Natural Philosopher wrote:
On 05/10/2020 23:07, Max Demian wrote:
On 05/10/2020 18:49, williamwright wrote:
On 05/10/2020 12:28, JohnP wrote:

A black radiator gives off more heat.

Why should the efficiency of a surface in absorbing light affect its
efficiency in radiating heat?

Because a guy called Kirchhoff said so.

And of course its all ******** because 'a black radiator gives off more
heat' is not qualified in anyway. Bleach washes whiter.

Non black radiators will get hotter....

Non black in visible, or non black in the relevant portion of infrared.

I can assure you they can be black in one and white in the other.