The elevators' cars of our houses
are paneled with different materials.
Such as this, made out of wood.
But they are actually metallic cages.
Steel.
Faraday cage.
- Manuel, there's no signal here.
- I have a very bad signal, too.
{\an8}FARADAY CAGES
We're closed in an elevator,
and elevators are Faraday cages.
If we want to call and there is
a microwave electromagnetic wave,
the ones cell phones use,
when reaching our elevator
- it creates small induced currents.
- On the outside.
On the outside walls
of the Faraday cage.
These currents have the opposite behavior
of the electromagnetic wave coming in.
So, it cancels them. Did you know
we have Faraday cages in our homes?
- The microwave?
- Correct.
The perfect Faraday cage
for the microwaves heating our food.
But, for example, the coaxial cable
you connect your television with
is also a Faraday cage.
It has a conductor copper wire
and a metallic jacket
working as a shield.
It avoids the electromagnetic waves
from the outside to affect our TV signal.
- Manuel. There is signal here.
- Yes. Auditory and visual signal.
You are not
in a Faraday cage anymore
because that elevator has two walls
made of crystal, which is not a conductor.
- What if there were a storm?
- You'd be fine. There's a lightning rod.
But statistically, the elevator
is the safest transport method.
