Sonoluminescence experiment help

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Discussion Overview

The discussion revolves around conducting a sonoluminescence experiment, focusing on the challenges faced in creating and maintaining a bubble within a flask. Participants share their setups, resonance frequencies, and seek advice on improving their methods.

Discussion Character

  • Exploratory
  • Technical explanation
  • Homework-related

Main Points Raised

  • One participant describes their setup, noting that their bubble did not easily move to the center of the flask as expected, despite achieving a resonance frequency of about 25.18 kHz.
  • Another participant suggests varying the output voltage, indicating that the original setup may differ from the referenced instructions, which could affect performance.
  • A participant mentions that the acoustic resonance they achieved is close to values reported in the instructions, but they still face issues with the bubble's behavior.
  • Concerns are raised about using a pipette to create bubbles, as it may introduce currents that affect the bubble's movement.
  • A link to an additional resource is provided, suggesting it may contain helpful information regarding achieving light from a single bubble.

Areas of Agreement / Disagreement

Participants express varying experiences and suggestions, indicating that multiple competing views and approaches exist regarding the setup and execution of the experiment. The discussion remains unresolved as participants continue to seek solutions.

Contextual Notes

Participants note that their setups may differ from the referenced instructions, which could impact the outcomes. There are also mentions of the need for patience and experimentation, suggesting that results may vary based on individual conditions.

linnus
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I am trying to do a sonoluminescence experiment. The instructions are from this site: http://www.techmind.org/sl/. I have everything set up today, but I think my way of making the bubble is wrong. From the description of the site, it seems like when you make the bubble it should easily go to the center of the flask, which did not happen in my case. My resonance frequency was about 25.18 kHz. I can get a max of about 10 V output from the mic, but I kept it at about 4 V since that is where the bubble will "light up" and stay in the center. I was wondering if anyone that has experience with this can give me some advice on how to make th bubble. I used a plastic pipette (the disposable kind), and it doesn't seem to work every well.

Thanks!
 
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Try to vary the output, you said that you kept it at about 4 Volts, well your set-up will be different then the one on that page so your power and/or frequency will be different.
Also one very inportant note on that page "Patience was essential"
Good luck!
Please let us know how it works out, Pictures if you can.
 
The acoustic resonance that they got was around "25.5kHz and another at 25.1kHz at room temperature". Mine was around 25.18kHz, which is really close to what they got. I did vary the voltage a bit after 4 volts was not working out for me, but I didn't change it that much. I'll play with it a bit more. The problem here is that from the descriptions, it sounds like the bubble flows toward the center easily, which isn't happening in my case. I was wondering if I was doing it right because if you use a pipette to make bubbles, it will also create a current inside the vessel (flask). Anyways thanks for your advice! I'll try to play with it a bit more and post pictures if I am successful.
 

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