Question

ultraviolet catastrophe​

Answer 1

Answer:

The ultraviolet catastrophe, also called the Rayleigh–Jeans catastrophe, was the prediction of late 19th century/early 20th century classical physics that an ideal black body (also blackbody) at thermal equilibrium will emit radiation in all frequency ranges, emitting more energy as the frequency increases.

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Answer 2

Answer:

The ultraviolet catastrophe is a failure of classical physics to predict observed phenomena:

Classical statistical physics predicts a somewhat unintuitive, but extraordinarily powerful theorem called the 'equipartition theorem'. It says that for all typical systems the average energy per degree of freedom is 1/2 k_B T. I.e., for a molecule that can rotate and vibrate, each of the (finite) modes of translation, vibration and rotation has the same average energy.