This book attempts to understand the multiple concepts and theories that fall under the umbrella of spectroscopy and how such advancements can be useful in our lives. The various projects that are constantly contributing towards advancing technologies and the evolution of this field are looked at in detail here. Those in search of information to further their knowledge of this field will be greatly assisted by this book. The purpose of this book is to present the most sought-after topics in this field to facilitate research and growth of the discipline.