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Essay Galaxy - Holograms Holograms

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. Believe it or not, you've just found a key to understanding how a hologram works. But what do waves in a pond have to do with those amazing three-dimensional pictures? How do waves make a hologram look like the real thing? It all starts with light. Without it, you can't see. And much like the ripples in a pond, light travels in waves. When you look at, say, an apple, what you really see are the waves of light reflected from it. Your two eyes each se....

Number Of Pages: 4 Number Of Words: 1066

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