2. Electronic spectroscopy showing rotational-vibrational transitions. The spectrum below shows the coupled electronic/rotational /vibrational transitions for NiC. The energy of the transitions are in the visible spectral range (dominated by the electronic transition betweeen different orbitals). The fine structure of lines informs on the rotational /vibrational transitions. The goal of this problem is to identify molecular parameters from the spectrum. What is the rotational constant of the molecule? What is the centrifugal distortion constant D of the rotational transition? Hint: You can graph the AAv; = (v vyi1) (Vg1 vy) for different J and obtain D from the slope or intercept