Thermionic and Photoelectric Effect in Metals

A further proof of the correctness of the idea of free electrons in metals and of the applicability of the Fermi-Dirac statistics is furnished 

Now the term a logic is in general so small compared to the other two terms, that it has been impossible up till now to decide whether the quantum theory formula with a = 2 is superior to the classical one 

By comparing the values thus found for a with other measurements, it has been definitely settled that the quantum theory formula is correct, and not the classical one. 

By measurement of the position of difeaction maxima we can now determine the value of the refractive index and so, knowing , calculate the work function the sake of greater accuracy, we should 

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