- 3B10. Transverse Pulses and Waves
- 3B10.10 Pulse on a Rope A heavy piece of stretched rope is given a quick pulse.
- 3B10.10 Pulse on a Spring Two students stretch a spring and one student hits it to give a transverse pulse.
- 3B10.16 Wave Speed Show the difference in wave speed and pulse shape on Shive machines with long and short rods.
- 3B10.20 Slinky on Table Create pulses and waves by hand on a Slinky stretched across a table.
- 3B10.30 Bell Labs Wave Machine Bell Telephone Company wave machine.
- 3B10.60 Water Waves Water waves in a long trough with glass sides.
- 3B10.75 Uncoupled Pendulum Waves A set of pendula, started in phase, exhibit a sequence of traveling waves, standing waves, and random motion.
- 3B20. Longitudinal Pulses and Waves
- 3B20.10 Hanging Slinky Compression pulses are sent along a hanging slinky.
- 3B20.70 Crova’s Disk Non-concentric circles painted on a glass disc appear to be compressions when projected through a slit.
- 3B22. Standing Waves
- 3B22.10 Melde’s Vibrating String Drive one end of a string over a pulley to a mass with Function Generator
- 3B22.30 Bell Labs Standing Waves Excite the Bell Labs machine at various rates to obtain standing waves with one, two, and three nodes.
- 3B22.40 Vertical Vibrating Bar Vibrate a yardstick or meter stick by hand through the fundamental and first overtone.
- 3B22.70 Soap Films Immerse a large frame in soap bubble solution. Shake the frame to create large amplitude standing waves.
- 3B22.90 Crank Wave Model Wire helixes turned about their axes in an overhead projector appear as waves traveling in opposite directions.
- 3B25. Impedance and Dispersion
- 3B25.10 Impedance Matching – Bell Labs Two sections of a horizontal torsion machine with different lengths are coupled.
- 3B25.20 Bell Labs Reflection A pulse sent down a Shive wave machine either reflects from a free or fixed end, or doesn’t reflect from a damped end.
- 3B25.26 Transverse Standing Waves A nice demonstration of standing waves with free ends using a long soft spring, and the Pasco mechanical wave driver.
- 3B25.51 Slinky Whistlers Audible whistlers from a Slinky.
- 3B27. Compound Waves
- 3B27.15 Wave Superposition Start positive pulses from each end of a Shive wave machine.
- 3B30. Wave Properties of Sound
- 3B30.30 Bell in a Vacuum An electric bell in a jar makes a sound that decreases in intensity as the air is evacuated from the jar.
- 3B33. Phase and Group Velocity
- 3B33.10 Phase and Group Velocity This article spells out the subtleties for getting both traces to move in one direction.
- 3B35. Reflection and Refraction (Sound)
- 3B35.60 Refraction of Water Waves Plane waves refract in a tank with deep and shallow sections.
- 3B39. Transfer of Energy in Waves
- 3B39.20 Dominoes Dominoes illustrate energy transfer mechanism.
- 3B39.40 Cup Telephone Each end of a long string is run through tin cans or plastic cups and secured with a big knot.
- 3B40. Doppler Effect
- 3B40.10 Doppler Buzzer A battery powered buzzer is placed inside a Nerf ball on a string.
- 3B40.20 Doppler Spear Excite a “singing rod”.
- 3B45. Shock Waves
- 3B45.10 Ripple Tank Film Loop – Shock Waves The film loop lasts 3:45.
- 3B45.25 Shock Wave – Coins A penny is flicked into a second penny being held down with your finger causing another penny in contact on the other side to fly off due to the created shock wave.
- 3B50. Interference and Diffraction
- 3B50.10 Ripple Tank – Single Slit The film loop lasts 3:30.
- 3B50.10 Single Slit Diffraction of Water Wave Ripple tank single slit diffraction with varying slit and wavelength.
- 3B50.20 Ripple Tank – Double Source A ripple tank with two point sources in phase.
- 3B50.25 Ripple Tank – Double Slit from a plane wave passing through a double slit in the ripple tank.
- 3B50.40 Moire’ Pattern Transparencies Superimpose transparencies of circle patterns to simulate interference and diffraction of waves from point sources.
- 3B50.40 Moire’ Pattern Interference effects that can be shown with silk fabric, a coiled spring, or inexpensive commercially available Moire’ patterns.
- 3B50.55 Interference Model (Stick Version) Painted wave trains on wood lath are attached to magnets for use on a steel blackboard.
- 3B50.55 Interference Model (19th Century Wheatstone Device) A device showing the constructive and destructive interference of waves.
- 3B55. Interference & Diffraction of Sound
- 3B55.10 Speaker Bar Speakers in phase are mounted on a turn table or Lazy Susan.
- 3B55.14 Speaker Bar Room Acoustics Problems The effects of reflections from the room surfaces are often underestimated.
- 3B55.32 Out-of-Phase Speakers Play music with a strong bass beat, and switch one of the speakers in and out of phase to show noise cancellation.
- 3B60. Beats
- 3B60.20 Beats with Speakers Drive the speakers with a frequency difference of about 1 Hz to hear the beats.
- 3B70. Coupled Resonators