An ideal blackbody in physics and astronomy is an object that
A) emits only infrared light and hence appears black to the eye.
B) does not emit or absorb any electromagnetic radiation.
C) absorbs and emits electromagnetic radiation at all wavelengths.
D) absorbs all electromagnetic radiation but emits none.

Question

Quizplus · Accepted Answer

An ideal blackbody is defined as an object that absorbs and emits electromagnetic radiation at all wavelengths perfectly, without reflecting any, making it an ideal emitter and absorber of radiation.

An Ideal Blackbody in Physics and Astronomy Is an Object