3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany •
www.3bscientific.com
Subject to technical amendments
© Copyright 2009 3B Scientific GmbH
6.2 Circular waves
•
Depending on the choice of the desired waves,
press 1 to 3 dippers onto the edge of the wave
exciter, pressing either briefly or for a lengthier
period as required.
•
With the help of the knurled screws, attach the
wave exciters to the vibrator.
•
Set the depth of immersion by setting the vi-
brator so that the lower edge of the exciter
touches the water surface in a straight plane.
•
On the control unit, set the desired frequency
and amplitude.
•
On the viewing screen, a stationary or slowly
moving wave pattern can be observed. Make
fine adjustments using the turning knob.
6.3 Determining the wavelength
When determining the wavelength, the magnifica-
tion factor
b
must be taken into account.
Magnification factor
b
can be calculated by placing
the biconcave lens onto the ripple tank for instance
and checking the ratio of its actual size
A
to the size
of its projection on the viewing screen
A
’.
b
=
A
’/
A
The actual wavelength
λ
can be calculated from the
wavelength
λ
’ measured on the viewing screen as
follows.
λ
=
λ
’/
b
7. Storage and maintenance
•
Store the ripple tank in a dust-free place.
•
Thoroughly dry the ripple tank after use to
prevent it developing water stains and lime
scale deposits.
