I recommend reading the papers here https://forgottenphysics.com/ https://forgottenphysics.com/ They're all short reads. There's one of them that goes into the

I recommend reading the papers here https://forgottenphysics.com/ https://forgottenphysics.com/ They're all short reads. There's one of them that goes into the history of E=hf and how Planck actually originally had E=htf but Boltzmann criticized him for it