The other main method of protecting people
from lightning is called a Faraday Cage. A
Faraday Cage is a device that distributes
the charge of a source of electromagnetic
disturbance (like lightning) along the
outside of the cage (usually a closed
surface made of metal) in such a way that
the charge on the inside of the Faraday Cage
remains close to zero. Cars and airplanes
are very good examples of Faraday Cages in
the real world. Despite the common myth that
cars can help keep you safe from lightning
because of their rubber tires it is actually
the metal body of the car acting as a
Faraday Cage that protects you. It may also
surprise you to know that it is estimated
that the average US commercial plane is
struck by lightning multiple times a year!
Fortunately, the metal frame of the plane
allows the current to pass through the
outside of the plane and continue on through
the air leaving the plane at most with only
very minor damage to the surface.
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