Hello! I'm trying to research about the history and development of Quantum theory, especially with regards to Max Planck's energy quanta. I don't understand what was the problem in classical physics that required Planck to formulate quantum theory/energy quanta, which seemed to have revolutionized physics at the time. I read about the blackbody radiation problem and the ultraviolet catastrophe that Planck had tackled on, but I'm having a hard time understanding it. All I could pick up is about some infinite energy in the body's system when it absorbs all incoming radiation. I don't know if that's even right. Anyway, if somebody could explain it to in layman's terms (if possible, with analogies), as I don't really have a working technical knowledge of physics and mathematics. Thanks you very much!