Question

Definition of Black Body
What is an ideal black body and give example for this?

Answer 1

thing which absorb all colours of white light (sun light ) seems black .
black holes absorb light due to it's high gravity that's why it seems to be black & can't be seen by our naked eyes

Answer 2

Answer:

A black body is a metal sphere coated with platinum - black and a hole on its surface.

A perfect black - body emits and absorbs all radiations .

However a perfect black - body does not exist .

Hope it helps :)