Introduction to Electrodynamics · Problem 10.19

Potentials and Fields — David J. Griffiths

Physics · lienard-wiechert-fields

Problem

Derive Eq. 10.70. First show that ∂tr∂t=zcz⋅u.\frac{\partial t_r}{\partial t} = \frac{\mathit{z}c}{\mathbf{\mathit{z}} \cdot \mathbf{u}}.

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