The Virginia Tech team put a laser sensor on the front of the car to look for activity in nearby areas.

VOA: special.2009.11.03

Before the laser, scientists developed a similar device: a maser which stands for Microwave Amplification by Stimulated Emission of Radiation.

VOA: special.2010.09.01

Scientific American magazine says huge lasers turn only about twenty to thirty percent of the energy they use into a laser beam.

VOA: special.2010.09.01

A special needle is inserted directly into the tumor and light energy is passed through a laser.

VOA: special.2010.11.23

Doctors Charles Campbell and Charles Koester used a laser to remove a tumor from a patient's eye at Columbia-Presbyterian Hospital in New York City.

VOA: special.2010.09.01

They include nets,giant collecting arms and powerful laser beams that would move or destroy space junk.

VOA: special.2009.04.01

Laser disc players use lasers to accurately read or write marks on a reflective,coated plastic disc.

VOA: special.2010.09.01

In Theodore Maiman's first laser, a rod of man-made ruby supplied the electrons.

VOA: special.2010.09.01

Mappers and builders use laser technology every day.

VOA: special.2010.09.01

Their guns are equipped with a special device that emits laser beams each time a Marine pulls a trigger.

VOA: standard.2010.04.06

The vests and helmets they are wearing have special sensors, which detect the direction of laser "rounds."

VOA: standard.2010.04.06

(Speaking) With LASIK,doctors use a laser to permanently change the shape of the cornea to improve vision.

VOA: standard.2010.03.03

An Australian company, Electro Optic Systems, has received a $3.5 million government grant to develop the world's first automated, high-precision, laser tracking technology.

VOA: standard.2010.07.24

Its ultimate aim is to build a series of laser tracking stations in various countries to provide a defensive shield for activity in space.

VOA: standard.2010.07.24

When a Marine gets hit by a laser beam, his weapon gets de-activated.

VOA: standard.2010.04.06

Lang lives in the San Francisco bay area. He is a laser physicist and graduate of the California Institute of Technology, and has nearly 50 U.S.patents to his name.

VOA: standard.2010.03.17

Dr.Craig Smith,the chief executive of Electro Optic Systems, says laser beams fired from the ground could protect astronauts and satellites by targeting space junk that travels at potentially devastating speeds.

VOA: standard.2010.07.24

The laser tracking system would work by giving space craft and satellites, which are able to be maneuvered, time to move out of the way of an incoming chunk of debris.

VOA: standard.2010.07.24

Because of their unique surface, each medal is struck with 12 dies nine times with 1,900 tons of pressure, the weight of more than The native designs were laser-engraved on each medal.

VOA: standard.2010.02.16