A group of Shanghai-based scientists have successfully developed a faster means of transmitting internet signals using light bulbs.
The technology is called Li-Fi. Yes “Light Fidelity”. It is a wireless communication that uses light as a carrier instead of the traditional radio frequencies that you are used to. It has the advantage of being able to be used in electromagnetic sensitive areas such as inside an aircraft or nuclear power plant without causing any interference and is more secure compared to Wi-Fi. It is also cheaper as it doesn’t require any specialised communication device other than a light bulb and a microchip.
The team, in an experiment, connected four computers to the internet using a single 1Watt light bulb. The leader of the research team, Professor Chi Nan, noted that an LED bulb inserted with special microchips was able to generate data rates at 150Mbps; a data speed that is higher than what is currently obtainable in China.
Note that Li-Fi technology proceeds from visible light communication (VLC) that was developed by Alexander Graham Bell in 1880. And since then, VLC has undergone a lot of technological innovations and apart from in Li-Fi, it is also being used in Fibre-optics Communication, Free Space Optics and RONJA.
#Wi-Fi, #Li-Fi #VLC.
Source: TechBeat, Wikipedia.
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