Question

The lines in hydrogen spectrum correspond to the energy levels. What do the fine lines in the spectrum correspond to?

• A. Orbitals
• B. Spin of an electron
• C. Orientation of orbitals
• D. Sub energy levels

Answer 1

The correct option is D Sub energy levels

Fine lines in $H$ spectrum corresponds to sub energy levels.

According to Sommerfeld's model, there are $(n-1)$ sub-orbits which are elliptical in shape and one is circular for any principal quantum number $n$.

The energy of these sub-orbits differs due to the relativistic variation of the moving electron mass.