Quantum mechanics

Pure mathematics

Ellipsoid

Materials science

Field (mathematics)

Distribution (mathematics)

Electric field

Classical mechanics

Charge density

Physics

Mathematics

Astronomy

Quantum electrodynamics

Mathematical analysis

Moment (physics)

Charge (physics)

Physica

It is demonstrated that the average value of the reaction field of an arbitrary charge distribution in an ellipsoidal cavity depends only on the electric moment of the charge distribution with respect to the centre of the cavity and on the size and shape of the cavity.

The average reaction field of an arbitrary charge distribution in an ellipsoidal cavity