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You might think of a laser as light forced into a single, directed beam, but scientists have recently discovered that if you fire a laser in one direction, the air itself can fire another right back. Using a 226nm UV laser, researchers at Princeton University managed to excite oxygen atoms to the p...

3 years ago 0 Comments
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William Fox of the Naval Postgraduate School in Monterey and John Vesecky, his colleague at UC Santa Cruz, are working on a modified radar gun that can identify suicide bombs worn under the clothing. To do this, they cataloged the most common arrangements of looped wires used to construct "suicide ...

4 years ago 0 Comments