Today molecular spectroscopies have become the prime tolls for determination of molecular structures, analysis of drugs, cell biology, etc. Both quantitative and qualitative analysis of the samples are possible with spectroscopic studies in its different modes of operations. This knowledge-based volume is specially designed for the students studying B.Sc (Hons.) and M.Sc in Chemistry/Chemical Sciences. It is written as per the syllabi of Indian Universities. Moreover, the book will be helpful to the students studying Biochemistry and Pharmacy at the college and university levels.