What is LiFi?

You might have heard about Li-Fi but don't know what it is actually. 
You all know about Wi-Fi.
If you don't no if you don't no don't worry  i'll tell you about Wi-Fi. It is a method by which you can use Internet wirelessly. It works on the principle of radio waves or you can say electromagnetic waves. Li-Wif is the future of Wi-Fo

But what it is actually?? 

In Li-Fi data transmits through the Light. It is similar to Wi-Fi the difference is that Wi-Fi transmits data through Radio waves or Magnetic wave but Li-Fi will transmits through Light. This is the future of internet. It will replace the modem with a bulb that will do the same work of a modem but it will work on the principle of light. We always have to turn on that bulb for using internet?? Yes, but you can dim the Light of that bulb, you cant see the lights of that bulb after dimming the light but your phone can. It was tested on 15 November, 2015 and the test for Li-Fi was gone successful.

Li-Fi Vs Wi-Fi

Parameter.	Li-Fi	Wi-Fi

Security	High	Medium
Transmit/Receive Power	High	Medium
Speed	High	High
Range	Low	High
Data Density	High	Low