|Michael Faraday electromagnetism|
- A conducting enclosure
- shields electromagnetic radiation
- if its holes are smaller
- than the wavelength of the radiation.
- The radiation induces
- an equal charge and opposite polarity
- on the surface of the cage
- nearer to the radiation source.
- and an equal charge
- of the same polarity
- on the far surface,
- neutralizing the radiation inside.
Corks and cans
- In 1755, Benjamin Franklin
- dipped an uncharged cork
- suspended on a silk thread
- into an insulated charged can,
- and found the cork
- was not attracted to the can
- as he thought it would be.
- An equal charge with opposite polarity
- builds up on the inside of the can.
- In 1843, Michael Faraday
- dipped a charged brass sphere
- into an insulated uncharged pewter ice pail.
- An equal charge with the same polarity
- builds up on the outside of the pail.
Equilibrium in flux
- Any force induces
- an opposite force
- to neutralize
- the threat.
- Like a child who hears
- but won’t listen,
- who says OK
- but won’t obey,
- a pewter shell
- protects the soul.