{
  "id": "glossary:faraday-cage",
  "collection": "glossary",
  "slug": "faraday-cage",
  "name": "Faraday cage",
  "summary": "A continuous grounded conductive enclosure. Effective in principle, and in practice limited entirely by its apertures.",
  "status": "verified",
  "lastVerified": "2026-08-12",
  "data": {
    "definition": "A Faraday cage excludes external electric fields and, if the conductor is continuous relative to the wavelength, radiofrequency fields. It does not exclude low-frequency magnetic fields, which pass through ordinary conductors essentially unattenuated. Any aperture larger than a small fraction of the wavelength behaves as a slot antenna, so seams and openings determine real performance — and a transmitter left inside a partial enclosure raises levels within it by reflection.",
    "category": "physics",
    "seeAlso": [
      "shielding:foil",
      "shielding:mesh"
    ]
  },
  "sources": [
    {
      "id": "sbm-2024",
      "title": "Building Biology Evaluation Guidelines for Sleeping Areas (SBM-2024)",
      "publisher": "Institut für Baubiologie + Nachhaltigkeit (IBN)",
      "url": "https://buildingbiology.com/site/downloads/SBM-2024_EVALUATION_GUIDELINES_EN.pdf",
      "year": 2024,
      "kind": "ngo",
      "retrieved": "2026-08-12"
    }
  ],
  "links": {
    "self": "https://emfbase.com/api/glossary/faraday-cage",
    "html": "https://emfbase.com/glossary/faraday-cage",
    "markdown": "https://emfbase.com/glossary/faraday-cage.md",
    "collection": "https://emfbase.com/api/glossary"
  }
}