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Optical determination of velocity of sound in liquids. 1.5.10-00

Get the concept of:
acoustics, ultrasonic frequencies, the speed of sound, frequency, wavelength, acoustic pressure, standing waves

Experiment:
The scattered light beam passes through a standing ultrasonic wave in a glass cell filled with liquid. Wavelength of the sound can determined from the central projection of the sound field, which arises from the inhomogeneity of the  refractive index of the liquid in the sound field.