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The energy necessary for excitation of a certain molecule to the first electronic excited state is 12,000 cm -1 .

The energy necessary for excitation of a certain molecule to the first electronic excited state is 12,000 cm-1. The separation between vibrational states in the excited state of this molecule is 1100 cm-1. 1) Draw the energy diagram showing the ground state, the first electronic excited state and 3 of the vibrational levels of the excited state. 2) Calculate the excitation spectrum in units of wavelengths (in nm) for the main electronic transition and for the transition from the ground state to the 3 lowest vibrational levels of the excited state. 

Note. The answer should be under a form of a graph depicting the excitation spectrum with the calculation of the levels (in nm) for each of the transitions. The final answer should show the spectrum in unit of wavelength (nanometers).

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