This book is written to understand the basics of Infrared and Ultraviolet Spectroscopy. There are so many topics to understand the basic concepts of Infrared and Ultraviolet Spectroscopy. It is specially designed for teaching and practicing the numericals of Infrared and Ultraviolet Spectroscopy to the post graduation students of science (chemistry). The book characterizes the framework consisting of chapters preceded by the Index, List of abbreviations and general introduction.