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Essentials of Physics is a comprehensive study of the fundamental concepts that form the basis of Physics. A sequel to Volume one, this book provides a detailed coverage of all the basic concepts of Physics like optics, electromagnetism, electric circuits, and atomic spectra. The topics are dealt with logically, emphasizing the role of mathematics and statistics into them. Each chapter is dealt with a separate phenomenon, that is further supported by mathematical equations and their derivations and solved examples. The figures and tables are added to give an analytical insight to the concepts explained. The book is designed specifically for the introductory-level college physics courses. Besides, it will be equally suitable for the students preparing for various competitive examinations. Salient Features Contains Numerical Problems and Multiple Choice Questions to check students’ comprehension on the subject. Includes Appendices on data, symbols, and important results used in Physics and Mathematics. About the Author SANJAY MORESHWAR WAGH PhD, is Director of the Central India Research Institute at Nagpur. He proposed that light consists of momentum-less quanta of only non-kinetic and non-potential energy. The equality of inertia and gravitational mass of a body is explained by him in a general manner. Dr. Wagh also proposed the emission origin for the wave phenomena and universal theory of relativity. Dr. Wagh is associated with many national and international societies of scientists and professionals. His research area includes theoretical astrophysics, image processing, fundamental physical interactions, nano-scale phenomena, Joshi effect, category theory, and physics of sports. DILIP ABASAHEB DESHPANDE PhD, is former Director of PCD Institute of Computer Studies and Research, Nagpur. He is also a member of the Governing Council and Emeritus Professor at the Central India Research Institute, Nagpur. Earlier, he served as a member of the Board of Studies in Physics of the Nagpur University. A fellow of the Institution of Electronics and Telecommunication Engineers, and a life member of the Indian Science Congress Association, The Indian Association of Physics Teachers, and Indian Physics Association, he has published over 40 research papers in journals of international repute. Professor Deshpande is also the author of many books on physics. His research interests include ferroelectrics and thermal analysis. Table of Contents Preface Chapter 1 Geometrical Optics or Ray Optics Chapter 2 Dispersion of Light and Aberration Chapter 3 Wave Theory and Interference Chapter 4 Diffraction of Light Chapter 5 Polarization of Light Chapter 6 Optical Instruments Chapter 7 Speed of Light Chapter 8 Sound Chapter 9 Static Electricity I Chapter 10 Static Electricity II Chapter 11 Electric Current, Resistivity and Conductivity Chapter 12 EMF and Current Chapter 13 Magnetism I Chapter 14 Magnetism II Chapter 15 Inductance, and Alternating Electrical Quantities Chapter 16 Thermoelectricity and Chemical Effects of Electric Current Chapter 17 Electromagnetic Waves Chapter 18 Atomic Spectra and the Structure of Atom Chapter 19 What Kind of Physical Body is Light? Appendix A Some Advance Topics Appendix B Multiple Choice Questions Appendix C Questions asked in the Competitive Examinations Appendix D Supplementary Material Bibliography Answers to Problems Index