Why does a black kettle radiate more heat than a silver kettle?

Answer 1

A perfectly black kettle will absorb and transmit all wavelengths of energy. Thus, the hot soup in the kettle will give up more of its energy to the kettle than it would to a perfectly reflective silver kettle.

The same would be true for nonideal black and silver kettles, but the difference between the two would be less.

Since the black kettle absorbs more energy than the silver kettle, it will be at a higher temperature than the silver kettle relative to its surroundings and will thus radiate more energy.

Answer 2

I hope that this isn't one of my school pupils cheating !
Mr Puplett

Answer 3

black always heats up quicker idk y this happens ....