3B SCIENTIFIC® PHYSICS Wellenwanne U21910

1.5 Circular wavefronts
• Fix the exciter for linear waves onto the
vibrator
• Attach dipper to the middle
• Adjust the vibrator so that dipper dips
into the middle of the tank
• Fill the tank to a depth of about 4 mm
• Adjust the dipper so that it just touches
the water
• Set the frequency regulator so that it is
synchronised at about 20 Hz (separation
of wave peaks about 1 cm)
• Adjust the amplitude regulator to get
the “nicest projection”
• Adjust the frequency so that waves appear
to “stand still” or move inward or
outward
1.6 Linear wavefronts
• Fix the exciter for linear waves onto the
vibrator and adjust to touch the surface
of the water (water depth approx. 4
mm)
• Move the vibrator so that the exciter
acts right at the edge of the tank
• Set the frequency regulator so that it is
synchronised at about 20 Hz (separation
of wave peaks about 1 cm)
• Adjust the amplitude regulator to get
the “nicest projection”
• Finely adjust the frequency so the projection
appears to “stand still”
2. Huygens principle
2.1 Linear waves encountering a narrow
slit
• Perform Experiment 1.6
• Place the obstruction with a wide slit
about 5 cm to 10 cm in front of the exciter
and parallel to the wavefronts
• Adjust the two (wide) slit adjustment
sliders so that the elementary wave beyond
the element is clearly visible
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