29 Sep
2011
29 Sep
'11
2:32 p.m.
On 29 Sep 2011 at 21:25, Tony Duell wrote:
Is it? I thought a dipole field fell off as 1/R^3.
Anyway, it falls
off pretty fast.
It's more complicated than that. At *near* distances, it's inverse-
square; at *far* distances, it's inverse-cube. At intermediate
distances, it's somewhere betweeen the two and a nightmare to
calculate.
--Chuck