Shive Wave Machine - Impedance Matching

Purpose

To show that no reflection occurs when the impedance of the load (dashpot) matches the impedance of the wave machine.

Equipment

Shive Wave Machine with dashpot.

Images

g3-06

Description

Adjust the impedance of the dashpot to eliminate any partial reflection of the incoming wave. The impedance of the dashpot can be changed by (1) adjusting the resistance of the air chamber, or (2) sliding the connection along a spine.

References

Thomas B. Greenslade, Jr., 19th Century Wave Machines, TPT 18, 510-517, (1980).