Cellphones could warn of imminent lightning strike

According to New Scientist, a Nokia cellphone that warns you to take cover if lightning is heading your way.

"Nokia proposes a warning system that uses the fact that a lightning bolt is an electric current that emits radio waves. Each bolt produces frequencies between 10 hertz and 5 gigahertz, and the distribution of these signals depends on how far away the lightning is.

The multiple receivers in a phone, such as Bluetooth, FM, tri-band GSM, Wi-Fi and RFID, can be tuned to pick up these signals, says Nokia (US patent application 2007/0085525).

Software will then interpret them, work out the distance to the lightning, and tell you if strikes are getting closer."

emily | 6:59 PM | Technology |
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