The discussion revolves around the differences between black bodies and non-black bodies in the context of Kirchoff's law, particularly focusing on their emissivity and absorptivity at a given temperature.
The discussion is ongoing, with participants raising questions about the attributes of black bodies and non-black bodies. Some guidance has been offered regarding the nature of emission and absorption, but no consensus has been reached.
Participants are examining the implications of Kirchoff's law and the characteristics of bodies at different wavelengths, indicating a need for clarity on definitions and assumptions related to black body behavior.
That it can absorb and emit freely at all wavelengths.Kqwert said:what really differs a black body and a non-black body in this case?
Alright, but the attribute of emitting all absorbed radiation is not unique for black bodies, rather it holds for all bodies?haruspex said:That it can absorb and emit freely at all wavelengths.
That it can emit at all the wavelengths at which it absorbs, yes, but that is not quite what you wrote.Kqwert said:Alright, but the attribute of emitting all absorbed radiation is not unique for black bodies, rather it holds for all bodies?