Question

what is basic reason of doublet line structure of spectrum of alkali metals​

Answer 1

Explanation:

Distance of the lone electron from the centre of the atomic core, i.e., nucleus. The coupling of spin with orbital angular momentum gives rise to the fine structure splitting of spectral lines and it gives a full account of the doublet structure of alkali spectra. This interaction is called spin orbit interaction.

Answer 2

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Distance of the lone electron from the centre of the atomic core, i.e., nucleus. The coupling of spin with orbital angular momentum gives rise to the fine structure splitting of spectral lines and it gives a full account of the doublet structure of alkali spectra. This interaction is called spin orbit interaction.

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