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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, deeper trough. Belie ....
Middle of paper
....ens 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 waves produced by a laser.
"Normal" white light from the sun or a lightbulb is a combination of
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| Word count: 1072 |
Page count: 4 |
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