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... II. The Framework ...
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paradoxes
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This interference pattern is similar to the Moiré patterns (see Figure 17).
These patterns are seen when driving through Wyoming and looking at two parallel snow picket fences, one behind the other. Because the spacing
of the pickets of both fences is exactly the same, i.e. they have the same frequency, the interference pattern between the two fences creates the
illusion of curved lines, or Moiré patterns. When the pickets from both fences line up, the view is solid wood, and where the gaps between the
pickets line up you see through the gap or partial gap. These interference patterns move as you drive past the picket fences, creating the illusion
of movement. There are several toys today which allow children to draw ellipses which overlap and create similar Moiré patterns. I grew up
drawing and thinking about these types of pictures with a double elliptical pendulum harmonograph,2.11
which hung from the basement ceiling.
Figure 17. A computer generated Moire Pattern2.12
The interference pattern recorded on the film is the actual hologram. When this hologram is illuminated
with the same frequency laser light it was created with, the 3-D image magically appears. This image allows you to move your head and see
behind objects in the front. However, if you look at the hologram under normal room light, it just looks like a set of dots and circles, more
intense at the center and tapering off in each direction. These dots and circles are the recorded interference pattern, the hologram.
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