This is a list of physicsrelated articles which, as of September 2020, did not exist on Citizendium. Feel free to add more.
Core Articles
An early initiative to identify wanted articles produced the list below, which is transcluded here for completeness; click here to edit it.
 String theory: Add brief definition or description
 General relativity: A mathematical theory relating gravity to nonEuclidean distortions in the geometry of space and time introduced by mass and energy, and reducing to the special theory of relativity in localized regions of space and time. ^{[e]}
 Mathematical physics: Add brief definition or description
 Statistical mechanics: A theoretical model by which one can derive the laws of thermodynamics via statistical analysis of the dynamics of a large number of atoms and molecules ^{[e]}
 Optics: A field of scientific, technological, and engineering study and application concerned with understanding light, — typically in the visible, ultraviolet, and infrared ranges of the electromagnetic spectrum — and harnessing it for useful tasks. ^{[e]}
 Condensed matter physics: Add brief definition or description
 Atomic, molecular, and optical physics: Add brief definition or description
 Nuclear physics: A branch of the science of physics involving nuclei of atoms, subatomic particles, and any reactions involving them. ^{[e]}
 Materials physics: Add brief definition or description
 Computational physics: Add brief definition or description
 Standard Model: A mathematical theory that describes the weak, electromagnetic and strong interactions between leptons and quarks, the basic particles of particle physics. ^{[e]}
 Particle accelerators: Add brief definition or description
 Huygen's principle: Add brief definition or description
 Lagrangian mechanics: Add brief definition or description
 Wave: Add brief definition or description
 Standing waves: Add brief definition or description
 Harmonic oscillator: Add brief definition or description
 Relativistic quantum mechanics: Add brief definition or description
 Fluid: Add brief definition or description
 Perturbation theory: Add brief definition or description
 Strong force: Add brief definition or description
 Fermion: Add brief definition or description
 Lepton: A spin 1/2 elementary particle, such as an electron, muon or neutrino, that is not subject to the strong force. ^{[e]}
 Hadron: A composite particle made up of quarks bound together by the strong force, such as a meson, proton, or a neutron. ^{[e]}
 Dirac equation: Add brief definition or description
 KleinGordon equation: Add brief definition or description
 Čerenkov radiation: Add brief definition or description
 Refractive index: Add brief definition or description
 Ferromagnetism: Add brief definition or description

