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Holograms
Part 1 of Paper
.... 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. Believe it or not,
you've just found a key to understanding how a hologram .... Part 2 of Paper
....eems 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 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 waves produced by a laser.
"Normal" white light fr.... |
| Number of words: 1072 - Approximate pages: 4 |
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