3B Scientific SW Ultrasonics Set (115 V, 50__60 Hz) - Manual (Page 5)

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5.4 Ultrasonic pen (including holder)
Warning: The transducer in the ultrasonic pen
is sensitive to moisture and mechanical effects.
• Do not subject the transducer to any me-
chanical stresses and do not let it come into
contact with liquids.
Ultrasonic probe with built-in transducer and
additional phase indicator in the form of an LED,
controlled by a current generated by the elec-
tronics board from the signal voltages of chan-
nels A and B. The brightness of the LED is re-
duced to a minimum when the phase difference
between the point where the measurement is
being made and a selected reference point is a
multiple of 360°.
The equipment can be held and moved by hand
or, in order to avoid interference from reflec-
tions, in the supplied holder.
Phase indicator input
(from channel A only): 0 … 15 mA (DC)
Frequency range:
1 Hz to 43 kHz
Output: Signal for
channel A or B
Connectors: 3.5-mm jack plugs,
input: ring
output: tip
Cable length: 1 m approx.
Dimensions: 10 mm x 150 mm approx.
Weight: 32 g approx. without
holder
5.5 Convex mirror
Transparent plastic convex mirror designed for
the space above a table top.
Focal length: 100 mm
Radius of curvature: 200 mm
Dimensions: 140 x 20 x 70 mm approx.
5.6 Fresnel zone plate
Plastic Fresnel zone plate designed for the
space above a table top.
Focal length: 35 mm
Dimensions: 140 x 20 x 50 mm approx.
5.7 Ultrasonic absorber
Component for demonstrating sound insulation
or for suppressing sound travelling directly from
transmitter to microphone probe in some ex-
periments.
Surface: Fleece textile
Dimensions: 80 x 15 x 50 mm approx.
5.8 Set for double slit
Set of equipment for setting up a double or sin-
gle slit or for use as individual reflectors or mir-
rors.
Surface: Plastic coated
Dimensions: 100 x 20 x 50 mm approx.
or
20 x 20 x 50 mm approx.
5.9 Semi-transparent mirror (50%) and
Semi-transparent mirror (25%)
Partially transparent and partially reflecting mir-
rors made of perforated plastic (50%) or ex-
panded aluminium (25%).
Dimensions: 100 x 20 x 60 mm approx.
5.10 BNC cable
For connecting amplifier outputs to an oscillo-
scope.
Cable length: 1 m approx.
5.11 BNC/4-mm cable
For connecting amplifier outputs to an analog
voltmeter.
Cable length: 1 m approx.
5.12 Set of work templates
Work templates for experiments:
• Diffraction at an edge
• Propagation of waves beyond a slit
• Diffraction by a double slit
• Constructive und destructive interference
arising from diffraction by a double slit
• Lloyd’s mirror
• Set-up for a simple interferometer
• Set-up for a Michelson interferometer