What are drawbacks of classical free electron theory?

Answer 1

The classical free electorn theory is not able to explain conductivity for semiconducter and insulators

Answer 2

In the atomic world, mechanics need to be reformulated via the Schrodinger Equation, and in the fast world, close to mother nature's speed limit (3.00 x 10^8 m/s ~ 186,000 mi/sec) time and space get sort of mixed up so light can travel at the same speed no matter how fast you go!

So Classical Mechanics is reformulated with Special and General Relativity and Quantum Mechanics.

Answer 3

Fails to explain stability of an atom

Explanation;

Electron moving round the nucleus, its energy should decrease (accelerated particle loss energy) according to classical mechanics and therefore velocity should decrease continuously and electron comes closer and closer to the nucleus until it collapses

Fails to explain the spectrum of hydrogen atom

Explanation;

According to classical mechanics an excited atom of hydrogen emit electromagnetic radiation in all the wavelength but in reality it is observed that they emit radiation of selected wavelength only

___________________________________________________________________

If your take on general mechanics is indeed correct, and that there is some form of energy loss in the atom, then maybe a portion of the energy that would be assumed to be expressed as a wave is instead expressed as kinetic energy along the lateral?

Answer 4

rathfard is the basis of obserstion of his x-partical scrting experiement esbishated that at atom changed central part(called naulucs)which is surrourded by negivity changed and light electro.

Answer 5

1) Classical mechanics does not account for the fact that energy can only be exchanged by tiny packets of a given minimal energy. Therefore in classical mechanics the energy of a system can increase or decrease continuously, while in quantum mechanics it can only decrease and increase by tiny steps.

2) Classical mechanics does not account for the fact that particles behave like waves in some circumstances. Equivalently, one can talk about the introduction of the uncertainty principle that basiquely tells: "the more precisely you will measure a particle position, the less precisely you will measure its speed" and vice et versa. This is not seen as an observational limit due to the weakness of the instruments used or of the human operator, but as a fundamental one: nature seems to be built like that.

Answer 6

Classical free electron theory fails to explain several phenomena such as specific heat capacities and the Hall effect. It also does not account for the discrete energy levels in an atom and the quantization of energy levels. Additionally, it cannot explain phenomena in semiconductors and insulators.