Drawbacks of classical free electron theory



1. From classical theory, the value of specific heat of metals calculated is not matching with experimental value.

2. Using this model, the electrical conductivity of semiconductors and insulators cannot explained.


3. At low temperatures K/T is not a constant. But by classical theory it is constant.


4. Ferromagnetism cannot be explained by this theory.


5. Classical theory cannot explain the photoelectric effect, Compton Effect and the black body radiation.


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