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  • q

  • See "spin." Read More
  • “Quantum theory” is the original name for the field that became known as “quantum mechanics" (which see). The connotations(...) Read More
  • See quantum realm. Read More

  • r

  • In classical physics, events are random only due to insufficient information. Let’s take the example of a coin toss. With an(...) Read More
  • In everyday life, we in the Westernized world assume that an objective reality exists external to us. We usually assume that(...) Read More
  • Renormalization is a technique for achieving greater precision in certain physics theories.* In quantum mechanics,(...) Read More
  • Rotational momentum is the same thing as “angular momentum.” It is the momentum or oomph that an object has when it rotates(...) Read More
  • A Rydberg atom has one or more electron(s) which have energy levels almost sufficient for the electron(s) to escape the(...) Read More

  • s

  • A scanning tunneling microscope (STM) is a type of electron microscope. It is much more powerful than an ordinary microscope(...) Read More
  • [This article is under construction.] The Schrodinger Cat(...) Read More
  • “Singularity” has a physics definition and a mathematical definition. Both definitions are given here. They fit together(...) Read More
  • See alpha, α. Read More
  • Spin is a property of subatomic and atomic particles. While spin was originally thought of as a particle twirling on its(...) Read More
  • See dynamic system. Read More
  • (Also called a “Stern-Gerlach machine.”) The Stern-Gerlach (SG) device detects the “quantum spin” of atoms and subatomic(...) Read More
  • Click for quantum superposition or click for superposition of classical waves. Read More
  • This article is about superpositions of waves as understood In classical physics. See superposition, quantum mechanics for(...) Read More
  • The term "superposition" is used in both classical physics and quantum physics. In this article, "superposition" is(...) Read More
  • In science, the term "system" takes the place of the common English words "thing" or "entity." Scientists use the term(...) Read More

  • t

  • A Tesla is a unit for measuring the strength of magnetism in any particular location. A Tesla is approximately the strength(...) Read More
  • Theoretical physics is one of two branches of physics: theoretical and experimental. Like almost all other types of physics,(...) Read More
  • For torque, see “moment of force.” Read More
  • See entry for quantum randomness. Read More

  • w

  • A wave is a movement that propagates through a medium. The accompanying animation demonstrates the motion of a seismic wave,(...) Read More
  • This article starts with the nature of wave equations in classical physics and moves into a brief description of the(...) Read More
  • The waveform is the shape of a wave. Below is a graph on paper of a waveform representing the sound waves created by blowing(...) Read More
  • See frequency. Read More
  • A wave function, in quantum mechanics, is an equation. It describes the behavior of quantum particles, usually electrons.(...) Read More
  • See wave function. Read More
  • See article collapse of the wave function.    Read More