Things: particles and other objects in physics

To describe and model the real world, physics has to have some representation of physical things. The theories of physics are conceptual and mathematical models of reality. They consist of concepts that are idealizations from the things that exist in real life. One such idealization is the concept of a particle. Although we’ll focus exclusively on particles in this section, to put them in context, here is a list of the variety of “things” you’ll come across in this book:

  • Particles: Starting from this section, much of this book will deal with particles. We say more about particles shortly, but in a nutshell they can be thought of as indivisible units that exist at discrete points in space. Therefore, ...

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