This book is designed to serve as a textbook for courses offered to upper-undergraduate students enrolled in physics and explains the broad spectrum of optics in a student-friendly way. The textbook covers the entire syllabi of the undergraduate courses being taught at both national and international universities including adequate details of mathematical expressions to help students understand the subject matter. The topics covered in this book are reflection, refraction, cardinal points, interference, Fresnel diffraction, Fraunhofer diffraction, lasers and holography, fiber optics, etc. This book explains each topic in a simple and lucid language with the help of solved problems. Exercises with multiple choice questions have been given at the end of each chapter for self-assessment. The detailed coverage and pedagogical tools make this an ideal textbook for students and researchers enrolled in senior undergraduate and beginning postgraduate physics students.