A point particle (or point-like, often spelt pointlike) is an idealized object heavily used in physics. Physics (Greek Physis - φύσις in everyday terms is the Science of Matter and its motion. Its defining feature is that it lacks spatial extension: being zero-dimensional, it does not take up space. In mathematics the dimension of a Space is roughly defined as the minimum number of Coordinates needed to specify every point within it A point particle is an appropriate representation of any object whose size, shape, and structure is irrelevant in a given context. For example, from far away an object of any shape will look and behave as a point-like object.
Sometimes due to specific combinations of properties extended objects behave as point-like even in their immediate vicinity. For example, spherical objects interacting in 3-dimensional space in a particular manner called the inverse square law behave in such a way as if all their matter were concentrated in the geometric centers of their spherical shapes. In Physics, an inverse-square law is any Physical law stating that some physical Quantity or strength is inversely proportional In Newtonian gravitation and classical electromagnetism, for example, the respective fields outside of a spherical object are identical to those of a point particle of equal charge/mass located at the center of the sphere. Newton 's law of universal Gravitation is a physical law describing the gravitational attraction between bodies with mass Electromagnetism is the Physics of the Electromagnetic field: a field which exerts a Force on particles that possess the property of In Physics, a field is a Physical quantity associated to each point of Spacetime. Mass is a fundamental concept in Physics, roughly corresponding to the Intuitive idea of how much Matter there is in an object
In particle physics, whose theoretical framework is relativistic quantum mechanics (also known as quantum field theory), "point particle" is synonymous with "elementary particle", which is defined as a particle without structure or, equivalently, as a particle lacking component parts, or a particle whose compositional details are too small to be detected by current experiments. Particle physics is a branch of Physics that studies the elementary constituents of Matter and Radiation, and the interactions between them Quantum mechanics is the study of mechanical systems whose dimensions are close to the Atomic scale such as Molecules Atoms Electrons In quantum field theory (QFT the forces between particles are mediated by other particles In Particle physics, an elementary particle or fundamental particle is a particle not known to have substructure that is it is not known to be made According to the Standard Model (of fundamental particles and forces), quarks, electrons and other leptons are point particles in this sense. The Standard Model of Particle physics is a theory that describes three of the four known Fundamental interactions together with the Elementary particles In Physics, a quark (kwɔrk kwɑːk or kwɑːrk is a type of Subatomic particle. The electron is a fundamental Subatomic particle that was identified and assigned the negative charge in 1897 by J Leptons are a family of fundamental Subatomic particles comprising the Electron, the Muon, and the Tauon (or tau particle as well as their