Question

explain why Central Heating radiators work better if they are painted black​

Answer 1

Answer:

because black colour absorb a large amount of heat so the radiator will work very well

Answer 2

Answer:

black painted surface may well radiate less than a flat matt white one. Both surfaces will convect heat to the air well enough. ... It's said that radiators painted with metallic colours are more likely to emit less heat than those who are coated with non-metallic paints.