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ESMMIO SW-university.com - open and free Electronic System of Mass Multilevel Individualized Training in Physics and Exact Sciences (information is provided to everyone at the level of their interests and capabilities with AI support for searching resources) SW-university.com ACHK_MYTH - Multilevel interactive course of microphysics for zimiks (, A.S. Chirtsov) Section: 5 - Quantum microphysics Topic: 1 - Foundations of quantum mechanics Lecture: 5 - Propagation of light in matter Question: 6 - ULTRAVIOLET CATASTROPHE Difficulty level - 3+ Duration 0: 52 : 55: Three options for reasoning are discussed that lead to the so-called ultraviolet catastrophe - the erroneous theoretical conclusion that thermodynamic equilibrium between light and matter is possible only if all the energy from the matter is transferred to the electromagnetic field. It is noted that obtaining the same erroneous result when solving three significantly different physical problems apparently indicates the existence of errors in the very foundations of physics.