Li-fi
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When we wirelessly connect a laptop to a home router, we do so over radio waves. We were first introduced to wireless data transmission using light back in 2014, and now France's Oledcomm has launched the first Android tablet with integrated Li-Fi.
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Mexican company Sisoft, working with researchers from the Autonomous Technological Institute of Mexico (ITAM), has developed a wireless Li-Fi technology that transmits data in visible light emitted from LED lamps, while lighting the room at the same time.