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zachary

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by

lis lab3

on 17 June 2013

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Transcript of zachary

Laser
by Zachary
The laser was invented by Arthur L. Schawlow.
Lasers are used in common devices such as DVD players, laser printers, and bar code scanners.
Doctors use lasers to do surgery, such as eye surgery.
Lasers carry TV and telephone signals over special cables.
Thanks for watching
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