PURPOSE: To show the changing field pattern from a rotating dipole.

DESCRIPTION: Position antenna so that the electric field from the transmitter picked up by the receiving antenna lights the lamp on the antenna. Then rotate the transmitting antenna with its stand, causing the light to turn on and off, dependent on the dipole radiation pattern of the antenna.

SUGGESTIONS: Limit the number of turns because of the power cord.

REFERENCES: (PIRA 8B10.65)

EQUIPMENT: Radiowave transmitter and receiver (from K8), rotating stool base (from D3), clamps to attach transmitter assembly to rotating base, and extension cord.

SETUP TIME: 15 min.