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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

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

VP1.7.8.1

Projection of a standing wave pattern in water (P1.7.8.1)

Debye-Sears-Effect (P1.7.8.1)

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

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

Description

Components of equipment sets

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