MIT Physics | Walter Lewin: The Electric Shield (Faraday Cage) Witness one of the most electrifying demonstrations in physics as Professor Walter Lewin steps inside a wire mesh cage and subjects himself to hundreds of thousands of volts. This unforgettable lecture illustrates the powerful concept of electric shielding, or the Faraday cage effect. Discover the fundamental principle of electrostatics that explains why the electric charge resides exclusively on the outer surface of a conductor, lea