Designed specifically for the UGTRB Physics Examination, this textbook provides an exhaustive and structured guide to Optics and Spectroscopy across 15 chapters. The contents systematically cover optical aberrations, dispersion in prisms, eyepieces, interference of light, thin films, Newton's rings, Fresnel and Fraunhofer diffraction, zone plates, diffraction gratings, polarization, double refraction, optical activity, fibre optics, lasers, UV-Visible spectroscopy, IR spectroscopy, and the Raman effect. Featuring rigorous derivations, clear ray diagrams, solved numericals, and extensive sets of model practice questions with detailed explanations, this book is an indispensable tool for competitive success.