National Security Secrets
#50. Knowing where someone is in a home whether or not they turn on lights, appliances, or any device... can be done with a cell phone - if there's an oscillating signal or current present and a static electric field.
The surprising accuracy this allows is do to impedance and resistance. For those without an electrical engineering degree, impedance is the effective resistance of an electric circuit or component to alternating current. Resistance is a measure of an object's opposition to the flow of electric current.
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Originally posted on 01-06-2022
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