As a model for electric quadrupole radiation, consider two oppositely oriented oscillating electric dipoles, separated by a

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As a model for electric quadrupole radiation, consider two oppositely oriented oscillating electric dipoles, separated by a distance d, as shown in Fig. 11.10. Use the results of Sect. 11.1.2 for the potentials of each dipole, but note that they are not located at the origin. Keeping only the terms of first order in d: 

(a) Find the scalar and vector potentials. 

(b) Find the electric and magnetic fields. 

(c) Find the Poynting vector and the power radiated. Sketch the intensity profile as a function of θ. 

+po cos wt Po cos wr

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