Physics for Information Science: Unit I: Electrical Properties of Materials

Failures of Classical Free Electron Theory

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Failures of classical free electron theory is a macroscopic theory.Classical theory states that all free electrons will absorb energy, but quantum theory states that only few electrons will absorb energy.

FAILURES OF CLASSICAL FREE ELECTRON THEORY

(i) It is a macroscopic theory

(ii) Classical theory states that all free electrons will absorb energy, but quantum theory states that only few electrons will absorb energy.

(iii) This theory cannot explain the Compton, photo-electric effect,

paramagnetism, ferromagnetism, etc.

(iv) The theoretical and experimental values of specific heat and electronic specific heat is not matched.

(v) By classical theoryconstantfor all temperatures but by Quantum theoryconstant for all temperatures.

(vi) The Lorentz number by classical theory does not have good agreement with the experimental value and is rectified by quantum theory.

Physics for Information Science: Unit I: Electrical Properties of Materials : Tag: : - Failures of Classical Free Electron Theory

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