Hi, Very basic question. Blackbodies are ideal emitters: at every frequency, they emit an amount of energy equal to or greater than any other object at the same temperature. Furthermore, they were named blackbodies since, AT ROOM TEMPERATURE, i.e. 300K, whatever radiation they re-emit (after absorbing it) is NOT in the visible (wavelength, hence frequency, change between absorbed and emitted radiation). Now, the fact that best emitters are black is only true around room temperature, or below, correct? I think I have read somewhere that above 2000K best emitters are no longer black, as they emit in the visible. Does this mean there are no truly black objects hotter than 2000K ? Thanks!