This book "Engineering Physics" is prepared specially for under graduate Courses & I and II semester Engineering Courses of various Universities. The content of the book is simple and coherent. This book covers MODERN PHYSICS, QUANTUM MECHANICS, ELECTRICAL CONDUCTIVITY IN METALS, DIELECTRICS, LASERS, OPTICAL FIBERS and CRYSTAL STRUCTURES.The content started with Modern Physics and ended by Crystal Structure. This content is directly or indirectly links with all technical courses.