Using Light to Send Data Across the Room - Jennifer 8 Lee
Light-based data transmission technology is attractive because it allows wireless communication without the use of radio gear, which can be dangerous in places like oil platforms (where it can cause sparks) and underwater (where the salt conducts electricity), or on planes (where it can interfere with other radio equipment). In addition, transmissions can be stopped simply by blocking the light, and thus can be stopped by walls, so there is less risk of data leaking out of a house or office. And researchers say they believe that signals can piggyback on lights that are already in use — street lamps, car headlights or room lighting. Indeed, Klipsch, a speaker manufacturer, last year introduced speakers which could receive music data from normal LED lightbulbs in the home.
The future of wifi is lifi.
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