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Postulate 2: When an electron revolves in any selected orbits, it neither emits nor absorbs energy . The energy of an electron in a particular orbit remains constant.

Thus, Bohr, by postulating this, removed the problems of Rutherford's atomic model as:

If the negatively charged electron revolves round the positive nucleus, it will continuously emit radiations. Thus, it will follow a spiral path and eventually will collapse. If it happens, the spectra of the atom should be continuous as it will radiate at all the frequences while collapsing. But, in practice, this doesn't happen and atom is stable.

  1. How?

  2. By postulating a statement, how could he solve the problem?

  3. What is the cause for his statement being correct?

  4. Why doesn't the electron lose or gain energy?

  5. Does electron follow his postulate?

  6. Or is there any physical intuition behind it?

Please help. (please give me a math-free explanation. I want the physical intuition.)

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closed as too broad by Rob Jeffries, ACuriousMind, JamalS, Prahar, Danu Nov 28 '14 at 0:20

There are either too many possible answers, or good answers would be too long for this format. Please add details to narrow the answer set or to isolate an issue that can be answered in a few paragraphs.If this question can be reworded to fit the rules in the help center, please edit the question.

Please read my answer here Collapse of the wave function and Heisenberg uncertainty where I address this part of the question.

1) there existed the spectra from hydrogen and other atoms that could be explained by quantized orbits

2) the hydrogen atom spectra were fitted with a series and the Bohr model explained the series

3) Postulates are as axioms for physics models, in addition for the axioms of the mathematical framework they are formulated in.

The Bohr model is an ad hoc model, describing the data but not really a theory since it could not be used except qualitatively for other atoms.

The model could accommodate the observations but physicists were not satisfied. Used to the elegance of mechanics and electrodynamics they were searching for differential equations that would give in their solution the same results as the Bohr model but be more general to be built into a theory. Schrodinger succeeded.

From then on the theory of quantum mechanics with its own postulates was developed, where the electron around the proton in the hydrogen atom is not in an orbit , but in a stable orbital, a probability locus for finding it at (x,y,z,t). It is postulate 6 in the list that posits stable orbitals.

Up to now the theory of quantum mechanics has been very successful, the QM postulates are validated as good choices fitting the mathematical models to data and making innumerable new predictions. It has given us from transistors and phones to computers and lasers, as the result of having fitted successfully how the underlying framework of matter works.

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