Is there a medium in which sound travels faster than light?

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SUMMARY

The discussion centers on the relationship between the speed of sound and the speed of light in various media. It concludes that no known medium can allow sound to travel faster than light due to the fundamental properties of molecular motion and energy transfer. The speed of sound is inversely proportional to the square root of density, while the speed of light decreases with increased density. Theoretical concepts such as Planck particles and Bose-Einstein condensates are mentioned, but practical examples show that sound cannot exceed light speed in any real material.

PREREQUISITES
  • Understanding of wave propagation in different media
  • Knowledge of the speed of sound and light in various materials
  • Familiarity with concepts of density and molecular motion
  • Basic principles of refractive index and dispersion
NEXT STEPS
  • Research the properties of Bose-Einstein condensates and their effect on light speed
  • Explore the concept of Planck particles and their theoretical implications
  • Study the relationship between density and wave speed in various materials
  • Investigate the principles of phonon polaritons and their interaction with light and sound
USEFUL FOR

Physicists, materials scientists, and anyone interested in the fundamental properties of sound and light in different media.

  • #31
cosmik debris said:
Yes, isn't one of the dominant energy conditions that the speed of sound be less than the speed of light?
The speed of sound needs to be less than the invariant speed, c, which is the speed of light in vacuum, not in a material.
 

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