Determination of the velocity of sound in liquids - standing ultrasonic waves as optical grating

VP1.7.8.1
Determination of the velocity of sound in liquids - standing ultrasonic waves as optical grating
Determination of the velocity of sound in liquids - standing ultrasonic waves as optical grating Projection of a standing wave pattern in water (P1.7.8.1)
Determination of the velocity of sound in liquids - standing ultrasonic waves as optical grating Debye-Sears-Effect (P1.7.8.1)
Determination of the velocity of sound in liquids - standing ultrasonic waves as optical grating Debye-Sears Effect, Diffraction at an ultrasound grating (P1.7.8.1)
Determination of the velocity of sound in liquids - standing ultrasonic waves as optical grating

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Description

Experiment P1.7.8.1 measures the wavelength of a standing ultrasound wave in different liquids. The local variation of density in the liquid is made visible on screen by geometrical projection.
In addition the experiment demonstrates the classic Debye-Sears-Effect, i.e. the diffraction of laser light by a phase grating created by ultrasound in a liquid. This is the basic principle of an acusto-optic modulator.

Components of equipment sets

1 41711 Ultrasound generator, 4 MHz LD
1 46032  8  Optical bench with standardised profile, 1 m LD
5 460374  8  Optics rider, 90/50 LD
1 471791  8  Diode laser, 635 nm, 1 mW LD
1 46002  4  Lens in frame, f=50 mm LD
1 46025  8  Prism table LD
1 47702  4  Plate glass cell (cuvette), 50 x 100 x 50 mm LD
1 460380  8  Cantilever arm LD
1 38235  4  Thermometer, -10...+50 °C/0.1 K LD
1 30041  4  Stand rod, 25 cm, 12 mm Ø LD
1 30101  4  Leybold multiclamp LD
1 441531  8  Screen LD
1 6753410  4  Water, pure, 5 l LD
1 6721210  4  Glycerin, 99 %, 250 ml LD
1 6719740  4  Ethanol, denaturated, 250 ml LD
GHS02GHS07 Danger H225 H319
1 6735700  4  Sodium chloride, 250 g LD
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