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تسجيل مستخدم جديدOn the inapplicability of a negative-phase-velocity condition as a negative-refraction condition for active materials
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A negative-phase-velocity condition derived by Depine and Lakhtakia [Microwave Opt Technol Lett 41 (2004) 315] for isotropic, homogeneous, passive, dielectric-magnetic materials is inapplicable as a negative-refraction condition for active materials.
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