====== Chladni Plate - Modes Of Vibration (nodes) ======

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===== Description =====

Demonstrate wave interference and nodes in a plate    Classes Used: Phys 101, 153


Wave interference, vibrational modes, nodes  





===== Purpose =====


To demonstrate wave interference and vibrational modes in a plate  



===== Apparatus =====


Function generator
Amplifier stereo with outpout
Chladni plate (speaker and plate attatched)
Plastic level
Salt
Plastic tray
Brush  



===== Setup =====


Attach the function generator output to the input at the back of the stereo labeled "Phono Right"
Ensure the stereo is set to play the Phono input
Attach the two cables from the back of the stereo to the speakers
Select a frequency and test the speaker to check if the polarity is right (they only work one way)
Place the plastic level in different directions on the plate and level the plate using the knobs on the triangular base
Once it is level, sprinkle evenly onto the plate as shown in the images below
Select one of the frequencies provided on the piece of paper and turn the volume up slowly 
A pattern will appear on the plate showing the plate's nodes at the respective frequency
Now change the frequency to display other modes



===== Notes =====


Use the plastic tray provided to prevent salt from making a mess
More salt needs to be added after frequency changes as it bounces off the plate
If there is uneven salt distribution, remove salt with the brush provided and reapply an even layer 

Frequencies:
71Hz, 89Hz, 139Hz, 184Hz, 284Hz, 355Hz, 535Hz, 630Hz (And others possible if searched for)  Updated on: 06/19/13

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| **Location** | ---- |
| **Maker** | Unknown |
| **Current State** | Working |
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