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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
collide, they make a single, deep ....
Middle of paper
.... can't reproduce the infinitely complicated
waves of light reflected by objects; the lens of a camera can only focus those
waves into a flat, 2-D image. But a hologram can capture a 3-D image so
lifelike that you can look around the image of the apple to an orange in the
background -and it's all thanks to the special kind of light wa.... |
| Word count: 1070 |
Page count: 4 |
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