[PDF] approximation dipolaire

What is a dipole approximation?

The approximation of a medium or an array of charges by only dipoles and their associated dipole moment density is sometimes called the point dipole approximation, the discrete dipole approximation, or simply the dipole approximation.

How do you find the electric dipole approximation for a perturbation?

Therefore, using the Fourier expansion of the electric field E ( z, t) = ? n A n ( t) u n ( z), where u n ( z) = sin ( k n z) and k n = n ? L, the notes claim that the electric dipole approximation for the perturbation becomes

How do you relate dipole moment to polarization?

As a first example relating dipole moment to polarization, consider a medium made up of a continuous charge density ? ( r) and a continuous dipole moment distribution p ( r ). [notes 5] The potential at a position r is:

Does potassium bromide have a dipole moment?

Potassium bromide (KBr) has one of the highest dipole moments because it is an ionic compound that exists as a molecule in the gas phase. The bent molecule H 2 O has a net dipole. The two bond dipoles do not cancel. The overall dipole moment of a molecule may be approximated as a vector sum of bond dipole moments.