Question

A blackbody absorbs radiation incident on it.

Answer 1

A black body or blackbody is an idealized physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence. ... A black body in thermal equilibrium (that is, at a constant temperature) emits electromagnetic radiation called black-body radiation.

Answer 2

A black body in thermal equilibrium that is at a constant temperature emits electromagnetic radiation called black body radiation