Abstract
The classical quantum theory of Bohr does not take the theory of relativity into account. The energy levels of a hydrogen atom, derived by Bohr, are known to be approximations. In this paper, the kinetic energy and momentum of an electron in a hydrogen atom are treated relativistically. This paper predicts the existence of an n=0 energy level present in a hydrogen atom. However, the state where n=0 is not an energy level of the electron comprising the hydrogen atom. It is thought that an electron in the n=0 state forms a pair with a positron, and constitutes the vacuum inside the hydrogen atom.
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