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What is Li-Fi technology ..Let's know all about Li-Fi

Li-Fi (Light Fidelity) , a ground-breaking light-based communication technology, which makes use of light waves instead of radio technology to deliver data . With the invention of new Li-fi technology, you will soon find light bulbs of your car, light lamps in your room, lights in subway, flashlight of your mobile and any other light source are providing you internet access at very high speed.
It is so far measured to be about 100 times faster than some Wi-Fi implementations, reaching speeds of 224 gigabits per second ! (Quite Amazing , Right ?)
So what exactly is Li-Fi and how does it work ?
Li-Fi is the use of the visible light portion of the electromagnetic spectrum to transmit information at very high speeds. This is in contrast to established forms of wireless communication such as Wi-Fi which use traditional radio frequency (RF) signals to transmit data.
Li-Fi is a Visible Light Communications (VLC) system for data transmission. A simple VLC system has two qualifying components:
  1. at least one device with a photodiode able to receive light signals and
  2. a light source equipped with a signal processing unit.
The functioning of new Li-Fi technology is just simple. You will have a light source at one end like a LED and a photo detector (Light Sensor) on the other end.
As soon as, LED starts glowing, photo detector or light sensor on other end will detect light and get a binary 1 otherwise binary 0. How can data be transmit via this new Li-F- technology?
Flashing a LED certain times will build up a message to transmit. Flashing of lightis detected by the photo detector or light sensor and it will receive a message.
Now, think of several LEDs with some different colors, flashing together and building a huge information to transmit. It is observed that green laser with the red laser can transmit data at 1 GBPS.
Security Concern of Li-Fi :
It is a proven fact that Li-Fi is more secure as compared to traditional Wi-Fi. This is because Wi-Fi routers are generally used by attackers to enter a network and strong firewalls are also unable to safeguard your network from these attackers. One of the common reasons behind this is that the range of Wi-Fi routers is an important factor which enables these security breaches into your Wi-Fi network.
On the other hand, Li-Fi uses light which limits the range of the internet connection and it cannot be increased at any cost. Thus, not letting the bulb be lightened or dimmed manually. This peculiar feature of Li-Fi will protect your network from interference from your neighbours.
Source -
What is LiFi? - pureLiFi™
Li-Fi
What is Li-Fi technology? - Lifi Research and Development Centre
How Does Li-Fi Work?
New Li-Fi Technology to access internet at high speed
Basic Difference between LiFi and WiFi
What is the Difference Between Li-Fi and Wi-Fi?

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