A multipole moment usually involves powers ( or inverse powers ) of the distance to the origin, as well as some angular dependence.
42.
Because the target wheel is an active, multipole magnet, air gaps can be even larger, up to 4.0 mm.
43.
When computer calculations of permanent multipole moments of any order became possible, the matter of the convergence of the multipole series became urgent.
44.
When computer calculations of permanent multipole moments of any order became possible, the matter of the convergence of the multipole series became urgent.
45.
If observation is confined to regions sufficiently remote from a system of charges, a multipole expansion of the exact polarization density can be made.
46.
In electric multipole radiation, the electric field has a radial component; in magnetic multipole radiation, the magnetic field has a radial component.
47.
In electric multipole radiation, the electric field has a radial component; in magnetic multipole radiation, the magnetic field has a radial component.
48.
This term appears as the second term in the multipole expansion of an arbitrary electrostatic potential ? ( "'r "').
49.
The " higher orders " correspond to further terms of the multipole expansion of a function on the sphere in terms of spherical harmonics.
50.
Very close to the source, the multipole expansion is less useful ( too many terms are required for an accurate description of the fields ).
