Hello friends, welcome to Fullonstudy. Today we are going to discuss another important post i.e. Zeeman splitting of D1 & D2 lines.

Let us consider the Zeeman splitting of resonance lines D1 & D2 of sodium lines.

These lines arises from the transition** 2P1/2 —–> 2S1/2 and. 2P3/2 ——–>2S1/2.**

The splitting of these terms may be displayed as :

Applying the selection rules :

*ΔMj = 0 , ±1 ( but Mj= 0 <—/—->Mj= 0 if ΔJ= 0 )*We obtain four Zeeman components for the D1 line and six components for the D2 line.

The components corresponding to Mj,=0 are polarised with electric vectors

perpendicular to the field (σ-components).

perpendicular to the field (σ-components).

The intensities of the Zeeman components are governed by the following rules :

(

**i**) The sum of all transitions starting from any initial Zeeman level is equal to sum of all transition starting from any other level having the same n and I values.**(ii**) The sum of all transitions arriving at any Zeeman level is equals to sum of all transitions arriving at any other level having the same n and I values.

The relative intensities are indicated by the heights of the lines drawn at the bottom of the fig. 2 above.

Related Posts :

- Thomson Model of Atom & It’s Drawbacks
- Scattering of alpha-particles :Rutherford model of atom
- Bohr’s model of Atom
- Bohr’s Theory of Hydrogen Spectrum
- Spectral Lines of Hydrogen atom
- What are Atomic Energy Levels?
- de-Broglie Model of Atom & Bohr’s Quantum Condition
- Excitation & Ionisation of Atoms & Molecules
- SHORTCOMINGS OF BOHR’S THEORY
- Effect of Nuclear motion on Spectra of Hydrogen like Atom
- Discovery of Heavy Hydrogen
- Bohr’s Correspondence Principle
- Quantum Numbers of an electron in an atom
- Pauli’s Exclusion Principle
- Larmor Precession : Behavior of magnetic Dipole in External magnetic field
- Space Quantisation of an Atom
- Electron Spin -Atomic Physics
- Fine Structure of Alkali Spectra & it’s Explanation
- Sommerfeld Extension of Bohr’s Theory
- Vector Model of Atom; Coupling of Orbital & Spin Angular Momentum
- Noramal & Anamolous Zeeman Effect
- Expalaination of Normal Zeeman Effect & Zeeman Shift
- Expalaination of Anamolous Zeeman effect
- Zeeman Splitting of D1 and D2 lines
- j-j Coupling -Atomic Physics
- L-S Coupling (Russell-Saunders Coupling)

## Trackbacks/Pingbacks