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  1. Physics | Definition, Types, Topics, Importance, & Facts | Britannica

    4 days ago · Physics is the branch of science that deals with the structure of matter and how the fundamental constituents of the universe interact. It studies objects ranging from the very small using …

  2. Physics Portal | Britannica

    Physics, the basic physical science, studies objects ranging from the very small (using quantum mechanics) to the entire universe (using general relativity). It deals with the structure of matter and …

  3. Physics Definition & Meaning | Britannica Dictionary

    PHYSICS meaning: a science that deals with matter and energy and the way they act on each other in heat, light, electricity, and sound

  4. Physical science | Definition, History, & Topics | Britannica

    As it developed in the 20th century, physics is concerned with the structure and behaviour of individual atoms and their components, while chemistry deals with the properties and reactions of molecules.

  5. Physics - Nuclear, Particles, Forces | Britannica

    4 days ago · One of the most significant branches of contemporary physics is the study of the fundamental subatomic constituents of matter, the elementary particles. This field, also called high …

  6. physics - Kids | Britannica Kids | Homework Help

    Physics is one of the major branches of science. People who work in physics are called physicists. Physicists study matter and the forces (pushes or pulls) that act on it.…

  7. Quantum | Definition & Facts | Britannica

    Dec 23, 2025 · Quantum, in physics, discrete natural unit, or packet, of energy, charge, angular momentum, or other physical property. Light, for example, appearing in some respects as a …

  8. Quantum mechanics | Definition, Development, & Equations | Britannica

    Dec 18, 2025 · It is important to realize that quantum mechanics is a branch of physics and that the business of physics is to describe and account for the way the world—on both the large and the …

  9. Work | Definition, Formula, & Units | Britannica

    Dec 10, 2025 · Work, in physics, measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement. …

  10. Displacement | Newtonian, Conservation & Vector | Britannica

    IOPscience - Journal of Physics: Conference Series - A discussion on velocity�speed and their instruction Loughborough University - Velocity and Acceleration