by combining the proton and electron spin, show that the ground state of Hydrogen splits into two energy levels (hyperfine splitting). Calculate the energies of the two levels and check that a single photon transition between them has a wavelength of 21 cm. Also, what are the spin quantum numbers of those two levels and what does this tell about the degeneracy of them?

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by combining the proton and electron spin, show that the
ground state of Hydrogen splits into two energy levels (hyperfine splitting).
Calculate the energies of the two levels and check that a single photon transition between
them has a wavelength of 21 cm. Also, what are the spin quantum numbers of those two
levels and what does this tell about the degeneracy of them?

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