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Some buildings, such as prisons, are constructed as a Faraday cage because they have reasons to block both incoming and outgoing cell phone calls by prisoners. [ 9 ] [ 10 ] The exhibit hall of the Green Bank Observatory is a Faraday cage to prevent interference with the operations of their radio telescopes .
It was a fortification built to withstand an atomic blast and ensure phones kept ringing even during and after an attack. Some of the telecommunication equipment was shielded by a Faraday cage, a ...
Electromagnetic shielding cages inside a disassembled mobile phone. In electrical engineering , electromagnetic shielding is the practice of reducing or redirecting the electromagnetic field (EMF) in a space with barriers made of conductive or magnetic materials.
Faraday cages also exist inside equipment. ie. inside a mobile/cell phone there is a lot of metal covers. At least some of this is for RF shielding. CRT TV/monitors (probably LCD/Plasma/LED displays too) have metal shields for various parts to stop interference getting out (& in too).
These are typically large paper bags that have been lined with multiple layers of aluminium foil to effectively shield the RF label from detection, much like a Faraday cage. A similar situation would be the loss of signal that a cell phone suffers inside an elevator: The electro-magnetic, or radio waves are effectively blocked, reducing the ...
Electromagnetic radiation is blocked where the wavelength is longer than any gaps. For example, mobile telephone signals are blocked in windowless metal enclosures that approximate a Faraday cage, such as elevator cabins, and parts of trains, cars, and ships. The same problem can affect signals in buildings with extensive steel reinforcement.
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