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A Faraday cage or Faraday shield is an enclosure used to block some electromagnetic fields. A Faraday shield may be formed by a continuous covering of conductive material, or in the case of a Faraday cage, by a mesh of such materials. Faraday cages are named after scientist Michael Faraday, who first constructed one in 1836. [1]
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[4] [5] It also demonstrates the principles behind electromagnetic shielding such as employed in the Faraday cage. [6] [7] The ice pail experiment was the first precise quantitative experiment on electrostatic charge. [8] It is still used today in lecture demonstrations and physics laboratory courses to teach the principles of electrostatics. [9]
The terms "Faraday cage" and "Faraday screen" mean exactly the same thing. For things like high-security computers, etc., that need to be protected from electromagnetic waves entering or leaving them (leaking out), they are put into rooms whose walls contain metal screens, similar to chicken wire or window screens built in.
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This shielding effect is used in what is now known as a Faraday cage. [59] In January 1836, Faraday had put a wooden frame, 12 ft square, on four glass supports and added paper walls and wire mesh. He then stepped inside and electrified it. When he stepped out of his electrified cage, Faraday had shown that electricity was a force, not an ...
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