Zeeman-Effect

Instructions

1. Select the "Magnetic Field vs Current" procedure from 'Select Procedure' dropdown menu.
2. Click on the 'Insert Hall probe' button to insert the probe into the electromagnet.The distance between electromagnet should be 1 cm.
3. Click on the 'Add to Table' button to add current and magnetic field values to the table.
4. Click on the 'Observation' button to view the table.
5. Click on the 'plot graph' button to view the graph.
6. Change the procedure to "Zeeman Effect" to calculate the Bohr magneton.
7. Click on the 'Insert mercury tube' button to insert the mercury discharge tube into the electromagnet.
8. Place the optical rail near the electromagnet. Place the converging lens, polarizer, Fabry Perot etalon (fix the thickness of air gap of etalon t= 4mm),telescope with focussing lens, and CCD camera on the rail.
9. Connect the CCD camera to the Monitor and observe the concentric circular rings.
10. Apply the maximum magnetic field and observe the splitting of spectral lines.
11. Set the centre of the specified line at the cross section as marked on the display.
12. Bring the inner most splitting of the first spectrum line at the cross section and note down the micrometre reading. This position is Ri
13. Now move the micrometre to adjust the second spectral splitting of the first line at the cross wire and note its reading
14. Similarly take readings of splitting in different spectral lines.
15. After getting the values of ,Calculate Bohr magneton using the relation. Where, h ⟹ Plank’s constant, B⟹ Magnetic field, c⟹ velocity of light, t⟹ thickness of air gap for etalon =4mm.