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The microwaves of the hydrogen line belongs to the atomic transition between the two hyperfine levels of the hydrogen first ground state with an energy difference of 5.9 µeV.The frequency of the quanta that are emitted by this transition between two different energy levels is given by the Planck-Einstein relation.
But The Bohr model is described the structure of hydrogen energy levels. Each shell is associated with principle quantum number n. The energy levels presented correspond with each shell. The amount of energy in each level is reported in eV, and the maxiumum energy is the ionization energy of 13.598eV.
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