3B SCIENTIFIC® PHYSICS Wellenwanne U21910

4.6 Refraction of a linear wave at a combination
of lenses
• Place the biconvex lens in front of the
biconcave lens
• Proceed as in Experiment 4.3
• Finely adjust until it can clearly be seen
that linear wavefronts are once more
visible beyond the second lens
4.7 Refraction of a linear wave at a prism
• Replace the lenses with prisms (as in
the photographs)
• Proceed as in preceding experiments
• Changes in the direction of propagation
of the wavefronts should be clearly visible
• Close observation should reveal that all
the wave properties of reflection, refraction
and also Huygen's principle can
be made apparent
5. Refraction of linear waves
5.1 Refraction at an edge
• Place the glass block right in front of
the exciter (see photograph)
• Finely adjust frequency and amplitude
until the propagation in the obstructed
region is clearly visible (refraction refers
to divergence from linear propagation)
5.2 Refraction at a single slit (wavelengths
greater than/smaller than the width of
the slit)
• Place the obstruction with the wide slit
parallel in front of the linear exciter
• Use the wide slit adjusters to set a
width between 1 and 2 cm
• Make fine adjustments till the resulting
waves are clearly visible (showing propagation
in the obstructed region)
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