Li-Fi

 

LI-FI

 

Chinese scientist introduce a new thing Li-Fi instead of Wi-Fi
It is nothing but Wi-Fi connectivity through light bulb.
A Micro chipped bulb can produce data speed of up to 150Mbps.
If we use this technique, only one watt led bulb would be enough to provide net connectivity to 4 computers.
It is also known as visible light communication (VLC).
Li-Fi promises to be cheaper and more energy efficient than existing wireless radio system ubiquity of LED bulbs.
Visible light is a part of EM spectrum & 10,000 times bigger than radio spectrum affording potentially unlimited capacity.

HOW IT IS USED FOR INTERNET CONNECTION?

Data from the internet and the local network is used to modulate the intensity of the LED light source in a way undetectable to the human eye.
The photo detector picks up the signal, which is converted back into a data stream and sent to the client.
The client can communicate through its own LED output or over the existing network.

ADVANTAGE:

 

It can be used under the sea using conduction property of salt water.
It can be used in planes because it won’t interfere with radio waves.
The data is blocked by walls so there is no chance of external data leakage.

 

DISADVANTAGE:

If light is blocked then the signal transmission is also blocked.
It can also be taken as advantage in security purposes.