PURPOSE: To demonstrate that radio waves cannot penetrate a Faraday cage.

DESCRIPTION: The radio is tuned to a good station so that everyone can hear. Lowering the screen Faraday cage over the radio stops the radio waves, and the sound of the radio ceases. Click here for mpg video of the action; the radio is tuned to the Washington, D.C., "sports radio" station.

SUGGESTIONS:

See Question of the Week #130 for information on using this demonstration to enhance class involvement.

REFERENCES: (PIRA 5B20.35)

EQUIPMENT: Portable radio, small mesh screen Faraday cage.

SETUP TIME: None.