What a pity!
IN Eyring, Walter, and Kimball's classic 1944 edition of "Quantum Chemistry", the authors, on pg. 23, call "E=hv" as the "Einstein Principle". Old Planck may weep in his grave when he hears this!!
Subrahmanyan Chandrasekhar: A study in fortitude and rigor
1 day ago in The Curious Wavefunction