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Li-Fi, or light fidelity, invented by German physicist and professor Harald Haas, is a wireless technology that makes use of visible light in place of radio waves to transmit data at terabits per second speeds—more than 100 times the speed of Wi-Fi.
Li-Fi uses common household LED (light emitting diodes) lightbulbs to enable data transfer, boasting speeds of up to 224 gigabits per second.
Li-Fi offers great promise to overcome the existing limitations of Wi-Fi by providing for data-heavy communication in short ranges. Since it does not pollute, it can be called a green technology for device-to-device communication in the Internet of Things (IoT).
LI-FI meets the 3L criteria: low interference, low power and low maintenance.
In addition, it has potential for the first two Hs of the three Hs of high data rates, high reliability and high affordability.
Since Li-Fi relies on visual light and not radio waves as the carrier but the last one—high affordability—may be achieved only when volumes increase, as it has in the case of Wi-Fi.
Li-Fi can also easily work underwater, where Wi-Fi fails completely, and thereby throwing open endless opportunities for military and navigational operations.
Visible light being safer, they can also be used in places where radio waves can’t be used such as petrochemical and nuclear plants and hospitals.
Similarly, in aircraft, where most of the control communication is performed through radio waves, there are restrictions on passenger communication using the same media, which can be easily handled through use of Li-Fi.
While some may think that Li-Fi with its 224 gigabits per second leaves Wi-Fi in the dust, Li-Fi's exclusive use of visible light could halt a mass uptake.
Li-Fi signals cannot pass through walls, so in order to enjoy full connectivity, capable LED bulbs will need to be placed throughout the home. Not to mention, Li-Fi requires the lightbulb is on at all times to provide connectivity, meaning that the lights will need to be on during the day.
What's more, where there is a lack of lightbulbs, there is a lack of Li-Fi internet so Li-Fi does take a hit when it comes to public Wi-Fi networks.
An extension of standard Wi-Fi is coming and it's called Wi-Fi HaLow.
This new project claims to double the range of connectivity while using less power. Due to this, Wi-Fi HaLow is reportedly perfect for battery powered devices such as smartwatches, smartphones and lends itself to Internet of Things devices such as sensors and smart applications.
Due to its impressive speeds, Li-Fi could make a huge impact on the internet of things too, with data transferred at much higher levels with even more devices able to connect to one another.
By: Vishal ProfileResourcesReport error
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