56
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WAVES, VIBRATIONS AND SOUND
Wave machine
The apparatus is used for demonstrating longitudinal and
2465.00
transverse oscillations. It is supplied with a drive shaft
with a crank which acts on a number of vertical rods as it
rotates. Each rod has a white dot marking at the top. The
last eight rods are supplied with an angular extension
which makes it possible to observe corresponding longi-
tudinal and transverse waves. A 360 degree scale is moun-
ted by the hand swing so that the phase angle can be read
off. Dimensions: (LxHxD) 48 x 32x10 cm. Mass: 1 kg.
Trichord
2212.00 Wave machine
For experiments with oscillating strings. The apparatus is
a wooden box with facilities for supporting strings under
tension. One string is placed under tension using weig-
hts, while the two others can be stretched using a tighte-
ning key. the apparatus can be used to illustrate how the
pitch of a tone depends upon the length of a string and
its tension. Provided with a centimeter scale and with two
2212.00
steel and one nylon string. Length: 60 cm.
2465.00 Trichord
Wave apparatus for transverse waves
2212.10
This is a very illustrative piece of equipment for demon-
strating transverse wave motion. It consists of 35 mas -
sive metal rods 46 cm long suspended in the middle by a
Wave apparatus
metal wire. The inertia of the system ensures slow and
easily studied wave motion, for the metal rods are provi-
(low cost)
ded with a yellow rubber marking at each end (contrast-
for transverse waves
ing with the black color of the apparatus). The apparatus
Illustrates vertically moving
provides an excellent illustration of the concepts of
transverse waves. The 28
wavelength, frequency, amplitude, reflection and phase.
arms extend from a central
Size: 90 x 46 x 30 cm.
band of neoprene rubber
2212.10 Wave apparatus for transverse waves
which provides flexibility and
a small amount of damping.
A wave front can be followed
through the first reflection,
but dies out relatively fast
2155.80
when it returns to the bottom
of the apparatus. Ideal for
demonstration of the proper-
ties of waves.
Placed between two sheets
of paper or cloth, the appa-
ratus can easily be rolled up
for storage
2213.00 Wave apparatus
for transverse waves
Set of 5 springs with hook
Set of five springs of equal length but with various spring
constant. With eye-let and hook.
2155.80 Set of 5 springs with hook
2213.00
®
Science Equipment for Education Physics
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