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Physics LibreTexts

7: The Four Fundamental Forces

  • Page ID
    15037
  • The fundamental forces are normally divided in four groups, of the four so-called “fundamental” forces.

    • 7.0: Prelude to the Fundamental Forces
      The fundamental forces are normally divided in four groups, of the four so-called “fundamental” forces.
    • 7.1: Gravity
      The theory of gravity can be looked at in three ways: (1) The old fashioned Newtonian gravity,  (2) Einstein’s theory of gravity and (3)quantum theory. Latter is still under development.
    • 7.2: Electromagnetism
    • 7.3: Weak Nuclear Force
      The weak nuclear force is manifests itself through nuclear β decay.
    • 7.4: Strong Nuclear Force
      The strong force is what keeps nuclei together. It is described by a theory called quantum chromodynamics (QCD), which described the forces between fermions called quarks that make up the hadrons. These forces are mediated by spin-1 bosons called gluons.

    Thumbnail: The Feynman diagram for the weak decay of a neutron.