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Primarily intended for the first-year undergraduate students of all branches of engineering, this textbook provides a sound understanding of the fundamental concepts and principles of physics in a simple and easy-to-understand style. 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. The book is written in accordance with the syllabi prescribed by the Guru Gobind Singh Indraprastha University and University of Delhi, but the topics covered in this book are also prescribed in the syllabi of almost all the universities and institutes. Therefore, the text will be useful for all the first-year engineering students studying in Indian Universities as well as Foreign Universities. Key Features Numerous unsolved problems in each chapter for the thorough understanding of the concepts and laws developed in the chapter Key Concepts at the end of each chapter for quick revision Review Questions, Numerical Problems and Objective Questions based on the pattern of Previous years’ Examination papers Detailed discussion on modern applications such as laser techniques, holograms and fibre optics. About The Author MAHESH C. JAIN, PhD, is Associate Professor, Department of Physics, Hindu College, University of Delhi. A life member of the Indian Association of Physics Teachers, he obtained his doctorate in Theoretical Nuclear Physics from the Indian Institute of Technology Kanpur in 1971. He has a distinguished academic career spanning more than three-and-a-half decades. Professor Jain has published several research papers in national and international journals and has authored several other books in physics. Table of Contents Preface Chapter 1 Forces in nature Chapter 2 Simple harmonic motion Chapter 3 Special theory of relativity Chapter 4 Light as wave and interference of light Chapter 5 Diffraction of light Chapter 6 Polarization of light Chapter 7 Optical instruments Chapter 8 Laser Chapter 9 Optical fibres Chapter 10 Mechanical waves Index