Physics Demo Manual

Demonstrations are cataloged according to PIRA Bibliography

PLEASE REQUEST DEMOS WELL IN ADVANCE

Due to Physics Building renovations, the lead time to set up demo requests has increased due to the need to transport equipment across campus. Please be kind and let me know well ahead of time what you need.

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Mechanics
Fluid Mechanics
Oscillations And Waves
Thermodynamics
Electricity And Magnetism
Optics
Modern Physics
Audio-Visual
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Harmonic Motion
Waves: video - Transverse Waves; video - Longitudinal Waves; Acoustic levitation; video - Standing Waves; Soap Film Standing Waves; Bell in a Vacuum; video - Doppler Buzzer; video - Diffraction & Interference in Ripple Tank; Double Slit Interference of Microwaves; Interference of Sound Waves; video - Tuning Fork Beats; Theremin; video - Oscillator Beats
Acoustics
Instruments

Interference of Sound Waves

Purpose:

To demonstrate the interference pattern produced by two sound sources of the same frequency.

Procedure:

Connect an oscillator (function generator) to each speaker and tune to 5 khz. By shifting their heads from side to side while plugging one ear with a finger, the students will be able to hear a definite interference pattern.

Hints:

One can use sound meter to see the variations of the intensity from spot to spot.

Equipment:

Audio Oscillator
Speakers w/ Built-In Audio Amps