A circular polarized dipole is described as a superposition of two linear dipoles. These forces originate from the attraction between permanent dipoles (dipolar molecules) and are temperature dependent. These magnetic dipoles produce a magnetic -field. The assembly of these dipoles forms a macroscopic polarization. Magnetic field constrains the orientation of magnetic dipoles in the refrigerant. These same oscillating dipoles also generate the reflected light. For shortwave broadcasts many stations use arrays of horizontal dipoles. The system consisted of several parallel dipoles separated vertically on the receiver masts. The magnetic dipoles of the atoms point in random directions. The transmitting antenna was an array of 10 pairs of dipoles with a reflecting mesh. They also arise from "intrinsic" magnetic dipoles arising from quantum-mechanical spin. All materials are made of atoms, which are dipoles. The second order arises due to the mutual interaction of the magnetic dipoles. This is the case, for instance, between the crossed dipoles used in the turnstile antenna. The term always includes the London dispersion force between instantaneously induced dipoles.