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The lowest energy, longest wavelength, electronic transition in a molecule occurs between what two energy


A. The pi and pi* orbitals

B. Molecular theory

C. The HOMO and LUMO

D. Lowest unoccupied electronic level, but different vibrational levels.

E. Vibrational and rotational coupling with the electronic levels

F. Lowest unoccupied electronic energy level, and then the next higher electronic level, etc.

I have tried answer F but it is incorrect :(

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