Optical determination of the velocity of sound in liquids

螢幕截圖 2016-04-05 15.28.17

Item no.: P2151000


A stationary ultrasonic wave in a glass cell full of liquid is traversed by a divergent beam of light. The sound wave length can be determined from the central projection of the sound field on the basis of the refractive index which changes with the sound pressure.


  1. To determine the wavelength of sound in liquids.
  2. From this calculate the sound velocity, from the structure of the centrally projected image.

What you can learn about

  • Ultrasonics
  • Sound velocity
  • Frequency
  • Wavelength
  • Sound pressure
  • Stationary waves
  • Debye-Sears effect

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