PURPOSE: To demonstrate standing waves in a stretched wire and to demonstrate Mersenne's first and second laws.
DESCRIPTION: The tensions in two stretched wires can be separately adjusted, creating different fundamental frequencies. Stops can be inserted along the wire to observe the frequency as a function of length, or to show the frequency ratio betwe en two similar wires with the same tension but of different lengths.
SUGGESTIONS: This is easier to use than the sonometer with weights, but the tension cannot be measured quantitatively.
REFERENCES: (PIRA 3D20.10)
EQUIPMENT: Sonometer with stops.
SETUP TIME: None.
Go back to Lecture-Demonstration Home Page.