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Scattering of Acoustic and Electromagnetic Waves by Small Impedance Bodies of Arbitrary Shapes by Alexander G. Ramm

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CHAPTER 4

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WAVE-FOCUSING MATERIALS

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4.1 What is a wave-focusing material?

Consider the scattering problem

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The scattering solution to equation (4.1.1) is of the form

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Here α ∈ S2 is a given unit vector in the direction of propagation of the incident plane wave, the coefficient A(β, α, k) = Aq(β, α, k) is called the scattering amplitude, β is the unit ...

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