Calculating the Frequency of White Light

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Discussion Overview

The discussion revolves around measuring the frequency of light emitted during sonoluminescence, specifically addressing the concept of white light and its spectral components. Participants explore the relationship between sound wave frequencies and emitted light frequencies, as well as the methodology for measuring these frequencies.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant seeks to measure the ratio of sound wave frequencies to light frequencies in sonoluminescence, questioning how to measure the frequency of white light.
  • Another participant asserts that white light does not have a single frequency, as it is a mixture of multiple frequencies, and questions the relevance of measuring "the frequency of white light."
  • A different participant reiterates that white light consists of multiple individual frequencies and suggests that measuring individual frequencies is possible but questions the meaningfulness of the inquiry.
  • One participant proposes measuring the wavelength of the emitted light using a spectrometer and then calculating the frequency based on the wavelength and the speed of light.
  • A later reply expresses gratitude for the suggestion of using a spectrometer, indicating a willingness to proceed with that method.

Areas of Agreement / Disagreement

Participants exhibit disagreement regarding the concept of measuring the frequency of white light, with some asserting it is not meaningful while others focus on the measurement of spectral lines. The discussion remains unresolved on the implications of measuring white light's frequency.

Contextual Notes

There are limitations in the discussion regarding the definitions of white light and the assumptions about its measurement. The relevance of the spectral lines in the context of white light is also not fully clarified.

nst.john
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I am doing a research project on sonoluminescence and I want to measure the ratio between the frequency of the sound waves needed to create the cavitation bubble to the frequency of the light emitted. If I have the spectral lines of the light emitted, is there a way to measure the frequency of the white light?

Thank You!
 
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White light does not have a frequency. It is a mixture of waves with frequencies in a specific range.
You can measure the frequencies of the spectral lines that you mention. Why did you ever mention white light? Do you think you have white light emitted by your system?
 
White light is, by definition, comprised of multiple individual frequencies. You could measure each individual frequency, but it is meaningless to ask about "the frequency of white light".
 
nst.john said:
If I have the spectral lines of the light emitted, is there a way to measure the frequency of the white light?

Measure the wavelength using a spectrometer, then calculate the frequency using the wavelength and the speed of light.
 
Sounds good. I know we have one at our school so I can do that. Thanks so much! this can help a lot.
 

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