> but was it lord Kelvin who said, physics just needs to figure out the ultraviolet catastrophe and it's done? This is apparently a common misconception regard

> but was it lord Kelvin who said, physics just needs to figure out the ultraviolet catastrophe and it's done? This is apparently a common misconception regarding a lecture given by Lord Kelvin in 1900 concerning "two clouds" in physics.[1] In fact, Max Planck solved the ultraviolet catastrophe, also in 1900, by assuming electromagnetic radiation can only be emitted or absorbed in discrete packets of energy called quanta. Albert Einstein also solved the ultraviolet catastrophe in a paper he published in 1905, for which he was awarded the Nobel Prize in 1922, by, as always, standing on the shoulders of giants, hypothesizing that Planck's quanta were actual particles. These particles are known today by a word coined by physical chemist Gilbert Newton Lewis in a letter to Nature in 1926, namely, photons. [1] https://arxiv.org/pdf/2106.16033.pdf https://arxiv.org/pdf/2106.16033.pdf