Can we accurately predict the speed of light using the index of refraction?

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SUMMARY

The discussion centers on accurately predicting the speed of light using the index of refraction, specifically noting that the index of refraction is 1.000293 at 1 atm and 0°C. A lab measurement yielded an index of 1.0002343, indicating a close approximation. Participants shared resources for adjusting calculations based on variables such as wavelength, temperature, pressure, humidity, and carbon dioxide content, which can enhance future experimental accuracy.

PREREQUISITES
  • Understanding of the index of refraction and its significance in optics
  • Familiarity with laboratory measurement techniques for light speed
  • Knowledge of how environmental factors affect optical measurements
  • Basic proficiency in using scientific calculators or software for data analysis
NEXT STEPS
  • Research the relationship between wavelength and the index of refraction
  • Explore the effects of temperature and pressure on light speed measurements
  • Learn about advanced optical measurement techniques and tools
  • Investigate the impact of humidity and carbon dioxide on light propagation
USEFUL FOR

Students conducting physics experiments, educators teaching optics, and researchers interested in precision measurements of light speed.

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Homework Statement



I was wondering if anyone knew of an equation or table that I could compare my labs measured speed of light to? I'm aware that the index of refraction is 1.000293 at 1 atm and 0°c but was hoping to find a way to check our values specifically. We ended up with 1.0002343 so I know we were close.

thanks for the help!
 
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You can play around with effects of wavelength, temperature and pressure (as well as humidity and carbon dioxide content) here.
 
Perfect, thank you! That put us a bit closer to the index (I figured this was the case) and gives me a way to make quick comparison's for future experiments. Really appreciate it.
 

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