Posts Tagged ‘lasers’

Blasting Lasers into the Sky To Make Lightning

lightning storm halleI think it’s reasonable to assume that ever since the dawn of humankind, people have yearned to control lightning. (No, Halle Berry did not create this idea for her role in X-Men.) The first approach—rain dances, spells, and the like—proved marginally effective, at best, but there wasn’t much of an alternative. In the ’70s, scientists found out that if they launched rockets carrying long metal wires into thunderstorms, the wires would sometimes provide enough conductance to coax a lightning strike, much like Ben Franklin’s (probably apocryphal) kite string. But around the same time, they also thought it would be much, much cooler to use a laser to bring about lightning. Most things are cooler when accomplished by lasers, as any scientist can tell you.

A group of European researchers working at South Baldy Peak have finally realized this longstanding goal by successfully bringing about lightning by zapping lasers into thunderclouds in a recent experiment. The ultrashort laser bursts (only around a hundred femtoseconds) ionize some of the molecules in the air, forming a plasma, and these channels of plasma act can guide lightning strikes like the wires on a rocket. (more…)

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April 14th, 2008 by Amos Kenigsberg in Environment, Technology | 1 Comment »

Pilots Attacked By Frickin’ Laser Beams

Last Friday night between 10:15 and 10:30 pm, six airplanes flying into Sydney Airport were victims of the city’s first coordinated laser attack, in which some miscreants shined lasers at the folks operating the flying tin cans carrying lots of people. The potentially dangerous maneuver provoked the government to consider banning laser pointers or classifying them as illegal weapons. (Shining laser beams at aircraft is already punishable by two years’ jail time and fines of up to $30,000.)

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April 1st, 2008 by Lizzie Buchen in Health & Medicine, Technology | 2 Comments »