nLab black body radiation




physics, mathematical physics, philosophy of physics

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theory (physics), model (physics)

experiment, measurement, computable physics



What is called black body radiation is the electromagnetic radiation emitted by an ideal non-reflecting (“black”) piece of matter in thermal equilibrium with the electromagnetic field around it, at any given temperature.

The experimentally observed black body radiation spectrum is a key effect and property of quantum physics, governed by energy/frequency quantization controlled by Planck's constant. In contrast, in classical field theory black body radiation comes out incorrectly, with an infinite energy] in the high [[frequency? modes (historically: “ultraviolet catastrophe”).


Last revised on January 26, 2019 at 07:30:18. See the history of this page for a list of all contributions to it.