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ehrenfest
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[SOLVED] Griffiths Example 3.8
Please stop reading unless you have Griffiths E and M book.
In Example 3.8, Griffiths makes two claims without justification that I want justification for. First, he says that V=0 in the equatorial plane (I assume this means that x-y plane). Second, he says that [tex]V \to -E_0 r \cos{\theta}[/tex] for [tex]r >>R[/tex]. Where does the cosine come from?
Homework Statement
Please stop reading unless you have Griffiths E and M book.
In Example 3.8, Griffiths makes two claims without justification that I want justification for. First, he says that V=0 in the equatorial plane (I assume this means that x-y plane). Second, he says that [tex]V \to -E_0 r \cos{\theta}[/tex] for [tex]r >>R[/tex]. Where does the cosine come from?