About This Book
Modern physics refers to the scientific concepts and theories that emerged in the early 20th century and
fundamentally changed our understanding of nature, especially at the atomic and subatomic levels.
Unlike classical physics, which deals with macroscopic phenomena and deterministic laws, modern
physics explores the behavior of matter and energy in extreme conditions-such as high velocities, small
scales, and strong gravitational or electromagnetic fields. The two major pillars of modern physics are
quantum mechanics and theory of relativity. Quantum mechanics, developed through the work of
scientists like Planck, Bohr, Heisenberg, and Schrödinger, explains phenomena at the atomic level, such
as the behavior of electrons, photons, and other fundamental particles. It introduced concepts like
quantization, wave-particle duality, uncertainty principle, and quantum entanglement. On the other
hand, Einstein's theories of special and general relativity revolutionized our understanding of space,
time, and gravity. These theories explain the constancy of the speed of light and the curvature of
spacetime due to mass and energy. Modern physics also includes developments in nuclear physics,
particle physics, and cosmology. It has led to technologies such as lasers, semiconductors, nuclear
energy, and MRI scanners. The ongoing quest for a unified theory, such as string theory, seeks to merge
quantum mechanics with gravity. This book explores the foundational principles and groundbreaking
discoveries of modern physics, from quantum mechanics to relativity.
Contents: 1. Introduction, 2. Fundamental Principles of Quantum Mechanics, 3. Atomic Physics,
4. Practical Uses of Laser Technology, 5. Physics of the Atomic Nucleus, 6. Curved Space-Time and
Gravitational Theory, 7. Applied Electromagnetism in Modern Devices, 8. Relativity and Quantum
Mechanics, 9. Techniques for Studying Thermodynamic Systems.
