Holograms

Want to read the rest of this paper? Join Essayworld today to view this entire essay and over 50,000 other term papers

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 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 from the sun or a lightbulb is a combination of
every colour of light in the spectrum -a mush of different waves that's
useless for holograms. But a laser shines light in a thin, intense beam
that's just one colour. That means laser light waves are uniform and in
step. When two laser beams intersect, like two sets of ripples meeting in
a pond, they produce a single new wave pattern: the hologram. ...

Get instant access to over 50,000 essays. Write better papers. Get better grades. Already a member? Login

CITE THIS PAGE: