作者superdevil (绿恶魔)
看板Physics
标题[题目] 一题dipole 的多极展开
时间Tue Apr 24 11:32:13 2007
[领域]电磁学 (题目相关领域)
[来源]课本习题David J Griffiths page151 problem3.29 (课本习题、考古题、参考书...)
[题目]for the dipole consists of two equal and opposite charges +-q separated
by a distance d.expand 1/η+- to order (d/r)^3 and use this to determine the
quadrupole and octopole terms in the potential.
[瓶颈] 不知道什麽意义???
是说dipole 也可以用多极展开来表示吗???? (写写自己的想法,方便大家为你解答)
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1F:推 pjily:把(r^2-2rdcosθ+d^2)^(-1/2) 用二项式定理展开 04/24 11:34
2F:推 chungweitw:yes 04/24 11:38
3F:推 Frobenius:LegendreP多项式 04/28 16:16