Ball Lightning Created In the Lab 190
EWAdams writes to point us to a New Scientist report that the mysterious phenomenon of ball lighting has now been created in a Brazilian research lab. The phenomenon has long been reported anecdotally but never explained or understood. Scientists have devised numerous possible explanations, including mini black holes left over from the Big Bang, but have had little success in producing working examples. From the article: "A more down-to-earth theory... is that ball lightning forms when lightning strikes soil, turning any silica in the soil into pure silicon vapor. As the vapor cools, the silicon condenses into a floating aerosol bound into a ball by charges that gather on its surface, and it glows with the heat of silicon recombining with oxygen. To test this idea, a [Brazilian] team... took wafers of silicon just 350 micrometers thick, placed them between two electrodes and zapped them with currents of up to 140 amps. Then... they moved the electrodes slightly apart, creating an electrical arc that vaporised the silicon. The arc spat out glowing fragments of silicon but also, sometimes, luminous orbs the size of ping-pong balls that persisted for up to 8 seconds." Here is a movie of the phenomenon.
Slashdotted Video? (Score:5, Informative)
Is ball lightning supposed to bounce around the ground like that? I thought it floated. 'Course, I could be mistaken.
- Greg
Re:Slashdotted Video? (Score:4, Informative)
Re:Having seen 'ball lightning'... (Score:3, Informative)
Perhaps because these are tiny lab expirment ones, a real one created with an actual lightning might indeed look quite different. The substance where a real one comes from is normally not a pure silicon based thing.
But I fear this is one of these things that are difficult to recreate accurately...
Re:Slashdotted Video? (Score:4, Informative)
I'm pretty sure (Score:4, Informative)
Re:I want names (Score:5, Informative)
http://www.newscientist.com/channel/fundamentals/
The same guy also talks about ball lightning due to neutrinos here:
http://www.holoscience.com/news.php?article=88edu
Re:Hmm? Something is missing (Score:3, Informative)
America (Score:3, Informative)
This has been done for over 2 decades already (Score:4, Informative)
Check it out at here [prometheus2.net] .
Pace VanDevender (Score:3, Informative)