High Quality Content by WIKIPEDIA articles! In physics, action at a distance is the interaction of two objects which are separated in space with no known mediator of the interaction. This term was used most often with early theories of gravity and electromagnetism to describe how an object could "know" the mass (in the case of gravity) or charge (in electromagnetism) of another distant object. Coulomb's law in electrostatics appears to be a theory with action-at-a-distance - Coulomb's law deals with charges which have always been static. Efforts to develop a theory of interaction between moving charges, electrodynamics, led to the necessity to introduce the concept of a field with physical properties. In the theory of electrodynamics as formulated in Maxwell's equations, interactions between moving charges are mediated by propagating deformations of an electromagnetic field. These deformations propagate with the speed of light and Maxwell's wave theory was later extended to cover Coulomb's law by the Lorenz gauge. The deformations of the field can carry momentum independently, thus facilitating conservation of angular momentum.

Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.