US Nav y / Greg Vojtko
ic!
ast
ant
tF
igh
L
The International Ye
ar of Light is a world
wide event
to teach everyone th
e importance of light
technology
in their lives now an
d in the future. Ligh
t has changed
science, medicine, an
d led to communicat
ion at
mind-boggling spee
d over the internet.
On
these pages we’ll lo
ok at lasers which
are man-made light
s, and
auroras which are
natural lights.
Lasers
Lasers are an amazin
g piece of modern te
chnology. They
are powerful beams
of light used in CDs an
d DVD players,
and in supermarkets
to read the barcodes
on the back of
food packaging. They
’re also used by metal
workers to cut
metal into intricate sh
apes and by doctors
specialising in
eye surgery. In space,
lasers have even been
sent to Mars!
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