…very low frequency. Anyway, the bottom end of the curve was right, but the top end was wrong. And why? It seems, said Jeans, remember, when he was worrying about the specific heat of gases, that motions which have high frequency are frozen out as the…

…would be kT. But at low temperatures, it should get very small. See if it isn't true. And this is the famous cutoff factor that Jeans was looking for. And if I use this instead of kT here, I obtain for the distribution of the light in a black box…

…it and checking it, it was always right. There was nothing wrong with the derivation. It doesn't agree with experiment. And about 1890, Jeans was to say, Talk again about this puzzle. I like to hear people who say that the physicists of the later part…

…it, you don't like it. It's not good to be too prejudiced about this thing. To summarize, I would use the words of Jeans, who said that the great architect seems to be a mathematician. And for you who don't know mathematics, it's really quite difficult…