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Light Fidelity (Li-Fi): The Future of the Internet

Praveen Thiru

But what’s next in the techno- evolution? Lifi!


The effect of internet has made a drastic difference on the way people lead their lives. Whether it’s an advantage or not, is an entirely different discussion. But leaving that aside, let’s talk about how we use the internet. Initially, ethernet cables were used to connect computers to the internet. And when Wi-Fi was introduced, computers could be connected to internet access points wirelessly. It’s no surprise that people embraced wireless technology and the convenience that came with it. But what’s next in the techno- evolution? That’s when the idea of Li-Fi came in!

What is Li-Fi!

Li-fi, is an abbreviation which stands for light fidelity. It is technically defined as a wireless optical networking device, which uses light emitting diodes (LED’s) to transmit information. Wi-Fi transmits information using electromagnetic waves, in the 2.4GHz or 5 GHz frequency bands. These waves are produced by the wifi routers, which converts the information it received from the ISP and transmits it. Wi-Fi modules in our devices then receive this radio waves to process it and give us access to the internet. The same concept of transmission and receiving applies to the Li-Fi technology too, the only difference being that instead of radio waves, visible light is used.

Li-Fi vs. Wi-Fi

Obviously, the first reason to use Li-fi over wifi is it’s superlatively higher speed. Experimental Li-Fi setups have reached speeds greater than 10 gigabytes per second (GBps). While these results were obtained in laboratory conditions, commercial kits have reached over 150MBps, a remarkable speed! Additionally:

  • 10000 times the frequency spectrum of radio.

  • More secure, because data cannot be intercepted without a clear line of sight.

  • Eliminates neighboring network interference.

  • Does not create, nor is affected by interference, making it ideal for use in sensitive environments, such as aircraft or hospitals

  • Does not create, interference in sensitive electronics, making it better for use in environments like hospitals and aircraft.

These facts clearly point to a future where Li-Fi is the norm in data transmission. that Li-fi will be the future of data and internet transmission. It know it may take us a few years to make it a reality, but technology is always unpredictable, and that’s what makes it beautiful!


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