
Can we call it a copper crown rather than a tin foil hat?
I realize there's a .0001% chance this will ever be necessary, but it was fun to make with my kids as a physics - electromagnetism and electrostatic equilibrium - lesson. (Obviously, the plastic bin goes inside as a seat for any electronics should an EMP hit the fan.) We tested and it perfectly blocked our FM radio signals which, as I understand it, are the same frequency as an EMP E1 phase (50-100 MHz).
However, 5G still penetrated the fortress' walls.
Can you hear me now?