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Electrodynamics, chap10 - Chapter 10 Scattering and...

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scatterer inc inc E H sc sc E H , p m θ 0 n n d λ ± 0 0 0 0 0 0 0 0 Consider a plane wave Assume free space. (10.1) Z / incident onto an object of di ik inc inc inc E e Z μ ε = = × n x Differential Scattering Cross Section : E ε H n E 0 1 0 2 mension , where can be real (linearly polarized) or complex [e.g. for circularly polarized wave, ( )]. and will induce multipoles on the object, which in turn generate x y inc inc d i λ ± = ± ε ε ε ε E H ± ( ) [ ] 2 0 4 0 scattered radiation ( , ). For , only the induced and are important. From (9.19) and (9.36), we have [in far zone] (10.2) Henc ikr sc sc k e sc r sc sc d c Z πε λ = × × × = × E H p m E n p n n m H n E ² e, to find and , we need to find the induced and sc sc E H p m. 10.1 Scattering at Long Wavelength Chapter 10: Scattering and Diffraction
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