LI-FI is a new a

1. Li Fi (Light Fidelity)
B.Ragavendran

2. Existing System
 Wi Fi
 Drawback of Wi Fi
 What we can do to overcome this drawbacks?
 Solution

3.  Why Visible Light?
Visible light communications (VLC) works by
switching bulbs on and off within nanoseconds, which is
too quickly to be noticed by the human eye. Although Li-Fi
bulbs would have to be kept on to transmit data, the bulbs
could be dimmed to the point that they were not visible to
humans and yet still functional. The light waves cannot
penetrate walls which makes a much shorter range,
though more secure from hacking, relative to Wi-Fi. Direct
line of sight isn't necessary for Li-Fi to transmit a signal;
light reflected off the walls can achieve 70 Mbit/s

4. Working Technology of Li Fi

5. Transmitting Elements
LED Fluorescent Lamp

6. Receiving Elements
Photo Diode Image Sensor

7. How Li Fi Works

9. Real Time Usage of Li Fi

10. Wi-Fi 150 Mbps
Bluetooth 3 Gbps
IrDA 4 Gbps
Comparison between Various Technologies
Wired
Wireless(Current)
Fire wire 800 Mbps
USB 3.0 5 Gbps
Thunderbolt 20 Gbps
Li-Fi 10 Gbps
Giga-IR 1 Gbps
Wi-Gig 2Gbps

11. Applications of Li Fi
 Airways:

13. Advantages of Li Fi
 Green information technology
 Lighting points Used as Hotspots
 Can be used in hospitals and even underwater

14. Drawbacks of Li Fi
 Li-Fi doesn’t work in the dark or outdoors.
 Li-Fi has a big drawback compared to Wi-Fi,
unlike wi-Fi we cannot move to other rooms
unless there are wired bulbs too.

15. Thank You