Synopsis Spectroscopic technologies form the most important single group of techniques used in chemical analysis. This book provides an authoritative account of every aspect of molecular and analytical spectroscopy of current interest and demonstrates progress in the subject that made in recent past. The book aims to provide students and practicing spectroscopists with an introduction and guide to the application of analytical techniques. It also aims at providing the reader with sufficient details of fundamental techniques to encourage further study and exploration in instrumental analysis. This book will prove to be highly informative for students in the disciplines of chemistry and physics.