The line marked A in Fig. 13.3 is the fluorescence spectrum of benzophenone in solid solution in

Question:

The line marked A in Fig. 13.3 is the fluorescence spectrum of benzophenone in solid solution in ethanol at low temperatures observed when the sample is illuminated with 360nm ultraviolet radiation. What can be said about the vibrational energy levels of the carbonyl group in (i) its ground electronic state and (ii) its excited electronic state?

Data in Fig. 13.3