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Which of the following statements is TRUE regarding vibrational spectroscopy?

A

The intensity of the fluorescence emission is restricted to the lowest vibrational level of the first excited electronic state.

B

The relative intensities of the fluorescence emission from a given energy level to the vibrational levels of the ground electronic state can be predicted using a Boltzmann distribution.

C

The energy spacing in the fine structure of a fluorescence spectrum represents the vibrational energy spacing of the ground electronic state.

D

Because the actual potential energy curve for a vibrational mode is anharmonic, the energy level spacing tends to become uniform at greater displacements.

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