For 10 points, what is this quantity, related to the strength of the second term in a multipole expansion?
A recent experiment at the Institut Laue-Langevin, Grenoble found that that of the neutron is no larger than 3 times 10 to the minus 26 e-centimeters. This and a similar bound for electrons are interesting probes of fundamental violation of parity and time reversal symmetries. For a dielectric sphere, it is proportional to the relative permittivity minus one, divided by the relative permittivity plus 2, a result known as the Clausius-Mossotti formula. For a general charge distribution, it is given by an integral of the position multiplied by the charge density. For the simple case of two equal and opposite point charges, it is simply the product of the distance between them and the charge. For 10 points, what is this quantity, related to the strength of the second term in a multipole expansion?
A recent experiment at the Institut Laue-Langevin, Grenoble found that that of the neutron is no larger than 3 times 10 to the minus 26 e-centimeters.
electric dipole moment [or EDM; prompt on "dipole moment"]