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Ultrasonic diffraction at a Fresnel zone plate / structure of a Fresnel zone

Product No: P2151800

Principle

A plane ultrasonic wave strikes a Fresnel zone plate. The sound intensity is determined as a function of the distance, using an ultrasonic detector that can be moved in the direction of the zone plate axis.

Tasks

Determine and plot a graph of the intensity of the ultrasound behind Fresnel zone plates as a function of the distance from the plate.
Carry out the same measurement series without plates.
Determine the focal points of the zone plates and compare the values found with those theoretically expected.

What you can learn about

Huygens principle
Longitudinal waves
Interference
Fraunhofer and Fresnel diffraction
Fresnel's zone construction
Zone plates

Materiallist (Excerpt)	Product	Amount
Ultrasound operation unit	13900-00	1
Optical profile-bench, l 1500mm	08281-00	1
Ultrasonic transmitter	13901-00	1
Ultrasonic receiver on stem	13902-00	1
Fresnel zone plates f.ultrasonic	13907-00	1
Digital multimeter 2010	07128-00	1
Power supply 5 VDC/2.4 A withDC-socket 2.1 mm	13900-99	1
Base for optical bench, adjustable	08284-00	2
Plate holder	02062-00	1
Stand tube	02060-00	3
Slide mount f.opt.profile-bench	08286-00	3
Connecting cord, 32 A, 500 mm, red	07361-01	1
Connecting cord, 32 A, 500 mm, blue	07361-04	1
Laboratory Experiments Physics, Chemistry, Biology andApplied Sciences, CD-ROM, incl. operating manuals	16502-42	1