How to calculate the strength of your Faraday cage, and levitating frogs (Fatima Theory tangent)
Channel: Frieza2000XTC
Date: 2021-12-08

Sort of a "deleted scene" from part 3 of my Fatima series. If you're looking to make or buy a Faraday cage to protect your electronics from an EMP, Carrington level solar flare, or even a small nova, this is everything you need to know.

The formulas:
[Maximum frequency it can block in Hz] = [Speed of light in meters per second]/([Largest hole diameter in meters]*2)
Protection in dB ~= 27*([Thickness of cage material in meters]/[Largest hole diameter in meters])*SQRT(1-([Frequency of EMP hitting the cage in Hz]/[Maximum frequency it can block in Hz])^2)

Part 1: https://youtu.be/AR2jC8N4IEM
Part 2: https://youtu.be/A17doiX1bxI
Part 3: https://youtu.be/TN7BAE6jJ_k
Faraday cages: [You are here]
The science video: https://youtu.be/ixT65WmsdPQ

00:00 Faraday cages: the math and science
00:23 How to calculate the cage's cutoff frequency
00:47 What frequency is an EMP?
01:57 How to calculate how much it will block
03:42 Recommended levels of blocking
04:11 If you're going to buy, get something certified MIL-STD
04:29 You don't need a Faraday cage for a Carrington Event
06:03 A micro-nova? How much induced current are we talking here?
10:34 Levitating frogs
13:04 Bottom line: you probably don't need a Faraday cage