<p>A cord wave demonstrator, comprising a guide rail (1), wherein a vibrator (2) is fixed at one end of the guide rail (1), and the vibrator (2) is connected to a thin cord (3); the guide rail (1) is movably connected to a bracket (4), and a fixed pulley (5) is installed at the top end of the bracket (4); the thin cord (3) is wound around the fixed pulley (5); and a hanging basket (6) used for placing a weight (7) is fixed at the end of the thin cord (3). The vibrator (2) is connected to a variable-frequency power source (8). The guide rail (1) is also provided with a graduated scale.</p>
