Holograms
Beginning of paper
Toss a pebble in a pond -see the ripples? Now drop two pebbles close
together. Look at what happens when the two sets of waves combine -you get
a new wave! When a crest and a trough meet, they cancel out and the water
goes flat. When two crests meet, they produce one, bigger crest. When two
troughs ....
Middle of paper
.... so that
you see the apple, and the rest of the world, in 3-D. You can look around
objects, too -if the apple is blocking the view of an orange behind it,
you can just move your head to one side. The apple seems to "move" out of
the way so you can see the orange or even the back of the apple. If that
seems a bit obvious, just try looking behind something in a regular
photograph! You can't, because the photograph can't reproduce the
infinitely complicated waves of light reflected by ....
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Word count: 1072
Page count: 4 (approximately 250 words per page)
