A Faraday cage, also known as a Faraday shield, is a conductive enclosure that blocks external electromagnetic fields and prevents them from entering the space inside.
A Faraday cage works by creating a barrier of conductive material that absorbs and redirects electromagnetic fields away from the enclosed space. This is known as the Faraday effect.
The main purpose of a Faraday cage is to protect sensitive electronic equipment from external electromagnetic interference, such as lightning strikes or power surges. It is also used in experiments and research involving electromagnetic fields.
No, a Faraday cage cannot protect against extremely low frequency (ELF) electromagnetic fields, such as those produced by power lines, as they have longer wavelengths that can pass through the holes in the cage's conductive material.
Yes, in addition to protecting against external electromagnetic fields, Faraday cages can also prevent internal electromagnetic fields from leaking out and potentially interfering with other equipment. Additionally, they can also block radio frequency identification (RFID) signals, making them useful for protecting against identity theft.