This theory introduces the idea that the laws of physics are the same for all observers moving at a constant speed, and that the speed of light is a universal constant. It famously led to the equation , showing that mass and energy are interchangeable.
Objects like electrons and photons exhibit properties of both particles and waves. They are neither one nor the other exclusively, but a "quantum" entity that behaves differently depending on how it is measured. Introduction to the Basic Concepts of Modern Ph...
Introduction to Modern Physics Modern physics is the study of the underlying principles that govern the universe at its most extreme scales—from the subatomic to the cosmological. Emerging at the dawn of the 20th century, it moved beyond the certainties of "Classical Physics" (Newtonian mechanics and Maxwell’s electromagnetism) to address phenomena that the old laws could not explain. 1. Quantum Mechanics: The Physics of the Very Small This theory introduces the idea that the laws