[UPSC CSE 2002] Molecular Physics (Q272, 10M)

(i) A sample is irradiated by a 5000 \AA\ radiation to give a Raman line at 5050.5 \AA. Calculate the Raman frequency. (ii) Explain, both red and violet degraded bands have been observed in electronic band systems, but rotation-vibration spectra show bands degraded to red only.