Hi, please could someone help me as I am struggling to understand the classical blackbody theory. I will briefly summarize what my textbook says. It says that if the classical model was correct then a tennis ball should be emitting radiation in mainly the ultraviolet region. The idea at the time was that atoms in the blackbody were thought of as oscillators which could vibrate at any frequency. The higher frequency oscillations would have more modes thus more ways of storing energy and therefore one would expect to find most of the energy in the ultraviolet range for any object above absolute zero as this is where most of the modes are. What I am struggling to understand is how this classical theory applies to low temperature objects such as a tennis ball. Even if the atoms of a tennis ball do indeed have more modes for the higher frequency oscillators where would it get the energy from to fill these modes when its only at room temperature!? I can see the logic (even though its wrong) that increasing the temperature/intensity would increase the radiation emitted all the way up to infinity but how does this classical theory also mean that things at room temperate for example, should also emit in mainly the ultraviolet region? Any help would be greatly appreciated!