Anonymous ID: 5bfd86 April 28, 2019, 9:01 a.m. No.6347492   ๐Ÿ—„๏ธ.is ๐Ÿ”—kun

>>6347414

>I know they build them for EMPs

thats true, but its also a prepper meme. faraday cages block most electromagnetic waves in general.

 

from (((Wikipedia)))"

>A Faraday cage operates because an external electrical field causes the electric charges within the cage's conducting material to be distributed so that they cancel the field's effect in the cage's interior. This phenomenon is used to protect sensitive electronic equipment from external radio frequency interference (RFI). Faraday cages are also used to enclose devices that produce RFI, such as radio transmitters, to prevent their radio waves from interfering with other nearby equipment. They are also used to protect people and equipment against actual electric currents such as lightning strikes and electrostatic discharges, since the enclosing cage conducts current around the outside of the enclosed space and none passes through the interior.

 

more links

 

https://science.howstuffworks.com/faraday-cage.htm

>As a Faraday cage distributes that charge or radiation around the cage's exterior, it cancels out electric charges or radiation within the cage's interior. In short, a Faraday cage is a hollow conductor, in which the charge remains on the external surface of the cage.