This textbook is organized in ten chapters covering the modules of the syllabus corresponding to interference of light, diffraction, polarization, optical instruments, laser, fibre optics, mechanics and special theory of relativity. Apart from giving a detailed theoretical analysis of the topics, various pedagogical aids such as solved numerical problems and Review Questions are also included at the end of each chapter. An effort has been made to ensure that all the topics taught in a single semester are presented within a single volume.