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:: Saturday, March 10, 2007 ::

Flux

Molten sodium mimics Earth's magnetic-field flipping
"It has long been known that the Earth's magnetic field flips direction every quarter of a million years or so resulting in the north and south poles changing places. Now physicists in France have witnessed this phenomenon of magnetic-field reversal for the first time in the laboratory, by monitoring a 160-litre vat of swirling molten sodium. Their observations could eventually lead to a better understanding of "dynamo action", which is responsible for celestial bodies like the Earth being able to generate their own magnetic field"

Labels: Physics

:: Dan 10.3.07 [Arc] [0 comments] [links to this post]    ::
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