That is one of the problems, since it is handy for kids to have cellphones, in order to get messages, allow parents to track them, etc.
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That is one of the problems, since it is handy for kids to have cellphones, in order to get messages, allow parents to track them, etc.
Shiftless2
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My son's former boarding school instituted a policy that said all cellphones had to be turned in to their housemaster/housemistress before classes started in the morning and wouldn't be returned until after the last class of the day. Students were getting around this by the simple expedient of purchasing a second phone (often paid for by their parents).
I remember speaking to the Headmaster about this and he said that no matter what rule the school put in place the kids were always two steps ahead of them.
Can either of you help clarify?
Faraday cage
n.
A container made of a conductor, such as wire mesh or the metal frame of an aircraft, forming an equipotential shield around what it encloses and protecting it from external electric fields. Also called Faraday shield.
[AfterMichael FARADAY, who constructed one in 1836.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
Perhaps you've seen B&W vid of a person inside one of these while high voltage, synthetic lightning is applied to the outside.
The notion being, if during construction of a school building electrical conductor is built into the external shell of the building, would that block cell-phone signals?
I thought it should, but it seems (even if against FAA regs) passengers at altitude can use cell-phones to communicate with Earth. Todd Beemer comes to mind.
I figured by now they were building cinemas like that. Apparently not?
My reason for asking: if that worked, inside the Faraday school the smartphone becomes a PDA (remember "Palm Pilot"?).
Reportedly occasionally an airliner is stricken by lightning mid-flight. It seems passengers & crew are spared electrical shock from lightning *, but that delicate avionics can succumb to the voltage transient, EMP.
* From the Aluminum skin on the fuselage. Not sure what happens if they switch to Carbon fiber.
I am not an expert, but I believe you can use a cellphone in a metal airplane because the metal is passive and just transmits the signal through at full strength.
What you need to do is weaken the signal.
And what I understand works is to shorten the antenna, with a bundle of short metal wires like mesh.
In fact, I believe that powdered metal would work the best.