I want to know the answer to the following question:
What did Rayleigh & Jeans and Einstein prove independently in 1905?
All the background I'm provided with is that "The black-body problem was revisited in 1905, when Rayleigh and Jeans (on the one hand) and Einstein (on the other hand) independently proved that classical electromagnetism could never account for the observed spectrum.". Is that enough to answer the question?