PURPOSE: To illustrate standing electromagnetic waves in a high-impedance transmission line.

DESCRIPTION: Slide the fluorescent tube along the wires as shown. It will light up at the antinodal regions and remain dark at the nodal points of the standing wave along the transmission line.

SUGGESTIONS: See Question of the Week #253 and #254 for information on using this demonstration to enhance class involvement.

REFERENCES: (PIRA 5N10.50)

EQUIPMENT: Radiowave transmitter with Lecher wires and fluorescent tube.

SETUP TIME: 5 min.