Standing Waves – 3B22.00
Vibrating String – 3B22.10
- A string is held under tensions and driven by a variable frequency oscillator.
- Changing the frequency will change the number of modes.
- Also increasing or decreasing the tension will change the number of modes.
Location: Keck B127 & Jacobs B122 – Shelf 279
Standing Waves on the Over Head Projector – 3B22.11
- Place the standing wave apparatus on the overhead projector.
- Plug in the apparatus and overhead and turn them both on.
- Slowly turn the knob on the apparatus until wave patterns appear on the screen or the wall.
- The apparatus will show clear patterns of one to seven nodes.
Location: Jacobs B122 – Shelf 285
Resonance in Glass Pipe Filled with Kerosene – 3B22.15
- The air inside a very large glass pipe partially filled with kerosene is acoustically excited into standing waves.
- Once resonating, the locations of the velocity antinodes inside the pipe are dramatically made evident by vigorous agitation of the fluid, resulting in fabulous foaming frothing fountains of fluid.
- The velocity of sound can also be determined by nothing the resonance frequency and measuring the distance between antinodes.
Location: Demo Room & Jacobs B122 – Shelf 175