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      "statement": "# Veselago: electrodynamics with simultaneously negative permittivity and permeability\n\nAnalyzed electromagnetic propagation when electric permittivity and magnetic permeability are simultaneously negative, deriving reversed relations among wave, energy-flow and refraction directions.\n\n## Scientific scope\n\nThe record targets the 1967 Russian paper and its 1968 English translation as one work. Later metamaterial designs, experimental negative refraction, perfect-lens proposals and device applications remain separate.\n\n## Reading status\n\nThis is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.\n\n## People and systems\n\nViktor G. Veselago\n\nThe named authors contributed to this scoped work; individual effort shares and later applications are not assigned by the byline.\n\n\n\n## Original sources\n\n- [Physics-Uspekhi record for Veselago negative-parameter electrodynamics](https://ufn.ru/en/articles/1968/4/d/)\n- [Crossref record for Veselago English translation](https://api.crossref.org/works/10.1070%2FPU1968v010n04ABEH003699)\n",
      "summary": "Analyzed electromagnetic propagation when electric permittivity and magnetic permeability are simultaneously negative, deriving reversed relations among wave, energy-flow and refraction directions.",
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