This book is a compilation of substantial information on spectroscopy. Spectroscopy is the field pertaining to absorption and emission of electromagnetic radiation through the interface between matter and energy. It is based on the principle that energy varies on the particular wavelength of electromagnetic radiation. It has proven to be critical as a research instrument in multiple spheres like chemistry, physics, biology, medicine and ecology. The spheres of study are growing rapidly and scientists are delving into unchartered areas in this sphere through the introduction of novel procedures. The essential motive of this book is to emphasize on the current spectroscopic techniques like Magnetic Induction Spectroscopy, Laser-Induced Breakdown Spectroscopy, etc. The book covers topics from fundamental to advanced levels of spectroscopy which will offer a great source of knowledge for education and research functions.