What are the selection rules for vibrational-rotational transitions?

1.	What are the selection rules for vibrational-rotational transitions?
Answer» Hey mate Both the VIBRATIONAL and rotational quantum NUMBERS must change. The TRANSITION : (Q-branch) is forbidden. The energy change of ROTATION can be either subtracted from or added to the energy change of vibration, giving the P- and R- branches of the SPECTRUM, respectively. Hope this satisfies you

Answer»

Hey mate

Both the VIBRATIONAL and rotational quantum NUMBERS must change. The TRANSITION : (Q-branch) is forbidden.

The energy change of ROTATION can be either subtracted from or added to the energy change of vibration, giving the P- and R- branches of the SPECTRUM, respectively.

Hope this satisfies you

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What are the selection rules for vibrational-rotational transitions?

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