A Faraday cage is a metal enclosure that blocks electric fields. It is named after the English scientist Michael Faraday, who first demonstrated the concept in 1836. Faraday cages are used to protect electronic devices from electromagnetic interference (EMI) and to create a shielded environment for scientific experiments.
Faraday cages are made of a conductive material, such as aluminum foil, copper, or steel. The material must be thick enough to block the electric field, but thin enough to be flexible. The cage must also be completely enclosed, with no holes or gaps.