Hi as far as I have understood: Blackbodies are physicsl objects which absorb electromagnetic waves at ALL frequencies. And the only light they radiate is determined by their temperature which means They don't reflect any light shined on them, they only emit Energy from their temperature. Here is my confusion and some questions i can't understand, a) What happens when a blackbody absorbs Electromagnetic waves? Where and how are the waves stored/absorbed in physical material ? When light is reflected it's because an Electron is excited and jumps to a higher orbit and back again, but how is light stored in physical objects - I can't understand that, because it seems impossible that an object can store infinite light -it must emmit it somehow?