This book is an introductory course meant for the students of B.Tech Semester II. The salient features of the book are : Numerous objective problems as well as short questions according to new pattern of examination. New topics e.g. nanotechnology, ultrasonic and superconductivity were recently introduced in the syllabus and have been covered with adequate details in the book. Illustration and figures to explain the complex concepts. Discussions on the topics which are although not the part of UPTU syllabus are of utmost importance for the coherence of the matter. About the Authors Dr. Vishal Singh Chandel did his M. Sc. in Physics with specialization in Electronics and then PhD from Lucknow University. He has qualified All India CSIR/UGC National Eligibility Test for the award of JRF.He has numerous papers to his credit in the field of Liquid Crystal and Ferro Electric Materials in International journals of repute and guiding M.Phil. and PhD students in their research work. He is teaching Physics to B.Tech Students at Integral University for the past one decade. Dr. Isht Vibhu did his M.Sc. in Physics with specialization in Electronics and then PhD from Lucknow University. He has qualified All India CSIR/UGC National Eligibility Test for the award of JRF. He has nine research papers to his credit. At present he is teaching Physics to the undergraduate students at Y D (P G )College, Lakhimpur Kheri.

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