3B SCIENTIFIC® PHYSICS Wellenwanne U21910

2.2 Circular waves encountering a narrow
slit
• Proceed as in Experiment 2.1 but raise
the exciter up and lower the dipper (so
that it just touches the surface of the
water)
• Move the vibrator so that the dipper
strikes the water about 5 cm in front of
the obstruction
• Vary the width of the slit so that the resulting
waves are clearly visible
2.3 How a block resembles a point-shaped
exciter
• Proceed as in Experiment 1.6
• Put a block in the centre of the tank
• Circular ripples spread out from the
block (as if from the dipper)
• Adjust the amplitude so that the resulting
waves are clearly visible
3. Reflection of waves
3.1 Reflection of a linear wave at a plane
wall
• Proceed as in Experiment 1.6
• Place the rectangular block about 5-10
cm from the exciter at an angle of 45°
to the wavefronts
• Make fine adjustments to the frequency
and amplitude till the reflected waves
are clearly visible
3.2 Reflection of a circular wave at a plane
wall
• Proceed as in Experiment 2.2
• Place the rectangular block about 5-10
cm from the exciter
a. parallel to the left wall of the tank,
b. at an angle of 45°
• Make fine adjustments to the frequency
and amplitude till the reflected waves
are clearly visible
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