This book presents a comprehensive study of important topics of Spectroscopic and Theoretical Physics for the P.G and Research Students. This book includes topics like ‘Raman Spectroscopy’ ‘Ultraviolet – Visible Spectrometry’ ‘Fourier Transform Infrared Spectrometer’ ‘Quantum Chemical Calculations’ ‘Pharmaceutical Materials’. This book will benefit the Students of Physics Chemistry and Pharmacology in a coherent and lucid manner.