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Description:
This paper is concerned with the time-harmonic electromagnetic scattering problem for a finite number M of point-like obstacles in \R^3. First, we give a rigorous justification of the Foldy method and describe the intermediate levels of scattering between the Born and Foldy models. Second, we study the problem of detecting the scatterers and the scattering strengths from the far-field measurements and discuss the effect of multiple scattering related to each of these models.