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HOLES IN A WALL demonstrates
that at every point in space there is an image of the scene beyond
it. This phenomenon is shown with a large piece of sheet metal drilled
with small holes, with very few holes at one end gradually increasing
in number to a dense clustering at the other. The visitor holds
a frosted plastic screen in front of the wall and sees that an image
is formed by each and every hole in the screen with the images becoming
very crowded and confused at the “holey" end of the exhibit,
even though each individual image remains sharp.
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