Physics 371 Demonstrations
Here is a composite list of demos that have been used for this course in the past and are grouped by Lecture days. This list is only a reference guide and may differ from actual demos used in lecture depending on which faculty is teaching this course.
Thanks to Paul Terry for helping with this Draft
Lecture 1
- Torsion Bar Wave Board
- Horizontal Rope tied to the anchors at either end of the room with tension applied
- Tuning forks with mic and scope to show wave form
- Big rubber band with folded paper projectile
Lecture 2
- Mic and Scope for wave form analysis along with a few instruments: violin, trumpet, recorder
- Hooke’s Law Spring
- Loop-the–Loop
- Any Misc simple harmonic motion
- Big rubber band with folded paper projectile
- Air track with carts
Lecture 3
- repeat last Lecture 2
- Big vertical spring
- Energy Tracks (Ball bearing on parabolic track)
- Simple U tube with fluid
- Horizontal two-mass rope set up that shows the two speeds of propagation.
Lecture 4
- Longitudinal Waves (Horizontally Slinky)
SF6 and H Gases for inhaling
- Organ pipes and some liquid nitrogen
- Frozen coronet - on this one I'll actually come down in the morning to tune the coronet and then stick it in the freezer.
Lecture 5
- Repeat Helium and balloon
- 2 tuning forks at same frequency with one with weights to attachments frequency; mic and scope to show beat wave pattern
Lecture 6
- Interference pattern of concentric circle (Two Transparencies)
- Old style Ripple Tank, with single, double slits and plane wave
- Standing wave on a String with Strobes
Lecture 7
- Standing wave on a String with Strobes
- Chladni Plates
- Standing wave tube with sliding microphone and scope
Lecture 8
- Standing wave tube with sliding microphone and scope
- Guitar
- String that goes across the room from the loops. All I want to do here is show that the propagating wave, after reflections, starts looking more like a standing wave. There is probably an optimal tension for seeing the effect, maybe even an optimal string thickness.
- Cable for hooking up my computer to play a guitar recording from an MP3 file.
Lecture 9
- Standing wave tube with sliding microphone and scope
- Organ pipe bellows and wood pipes (especially the one with the sliding end piece)
Lecture 10
- Hooke’s Law Spring
- Standing wave tube with sliding microphone and scope
- Tuning forks
Lecture 11
- Exam day, no demos are needed.
Lecture 12
Fourier Analysis Stuff
- Voce Vita set up with mic for real time analysis of trumpet, violin, flute, etc.
- Your daughter's Electric Keyboard if you can borrow it
- Nine-harmonic Fourier synthesis box. I think you usually set this one up to build a square wave.
Lecture 13
- Real time Fourier analysis with mic
- Your daughter's keyboard if you can borrow it.
- Fourier synthesis box with square wave form set up on it.
Lecture 14
- Play audio from my computer
Lecture 15
- CD, Phillips Sound demos from my laptop
Lecture 16
- CD, Phillips Sound demos from my laptop
- Is there a model of the ear that can be used as a visual aid? (NO!)
Lecture 17
- Timpani with real time Fourier analysis (mic, projection on wall).
Lecture 18
- Timpani
- Real time Fourier transform
Lecture 19
- I will be doing the Phillips sound demos with my laptop.
- Monochord with mic. (Scope?)
Lecture 20
- I am bringing in the clavichord and we’ll need a mic.
Lecture 21
- Exam today, so no demos.
Lecture 22
- Casio keyboard with mic and real time Fourier analysis
- Steinway piano action
Lecture 23
- Steinway piano action demo
- Phillips sound demos - all I need here is just the hook up from my computer to the sound system
- Inharmonicity in metal bars, chimes, etc., and this would involve Fourier analysis.
Lecture 24
- Projection capability for graphics from my computer
- Organ pipe demos.