Li-Fi is a wireless optical networking technology that uses light-emitting diodes (LEDs) for data transmission. It can provide higher speeds than Wi-Fi and has a wider bandwidth. Li-Fi works by varying the intensity of light from an LED to transmit data, with off-the-shelf LED bulbs able to transmit data at speeds up to 100 times faster than Wi-Fi. It offers several advantages over Wi-Fi as the light spectrum is much larger and radio frequencies are becoming crowded. However, Li-Fi also faces challenges as it requires line of sight and has a limited range.

2.  Wi Fi Technology
 Present Scenario
 Li-Fi Technology
 Working Process
 Li-Fi vs. Wi-Fi
 Applications
 Challenges for Li-Fi
 Future Scope
 Conclusion

3. Wireless Fidelity
Wi Fi is a wireless networking
technology that allows Computer
and other devices to Communicate
over a Wireless Signal.

4. 1.4 Million 5 Billion

5. Radio Spectrum is congested but the demand
for wireless data double each year. Every thing,
it seems want to use wireless data but the
capacity is drying up.

9. LI-FI is transmission of data through
illumination, sending data through a LED
light bulb that varies intensity faster than
human eye can follow.

10. The technology truly began during the
1990's in countries like Germany, Korea,
and Japan where they discovered LED's
could be retrofitted to send
information. Harold Haas continues to
wow the world with the potential to use
light for communication .

14. Radio
Waves
Infrared
Rays
Visible
Rays
Ultraviolet
Rays X- Rays
Gama
Rays
Gama rays cant be used as they could be dangerous.
X-rays have similar health issues.
Ultraviolet light is good for place without people, but other wise dangerous for
the human body.
Infrared, due to eye safety regulation, can only be used with low power.
HENCE WE LEFT WITH THE ONLY THE VISIBLE - LIGHT SPECTRUM.

16. Traffic Light
Traffic lights can communicate to the car and with each
other. Cars have LED-based headlights, LED-based cack
lights, and cars can communicate with each other and
prevent accidents in by exchanging information.

17. Airplanes
Whenever we travel through airways we face the problem
in communication media ,because the whole airways
communication are performed on the basis of radio waves.
To overcome this drawback on radio waves , li-fi is
introduced.

18. In Ocean Beds
Li-Fi can even wok underwater were Wi-Fi fails
completely, thereby throwing open endless opportunities
for military/navigation operations.

19. Intrinsically Safe Environment :
Visible Light is more safe than RF, hence it can
be used in places where RF can't be used such as
petrochemical plants .

20.  Light does not pass through walls.
 Li Fi requires line of sight.
 A major challenge facing Li-Fi is how
the receiving device will transmit back
to transmitter.
High Installation cost of VLC system.

21. The possibilities are numerous and
can be explored further. If this
technology can be put into practical
use , every bulb can be used
something like a Wi-Fi hotspots to
transmit wireless data.

22. If all the effort is put together to
make this technology in practical
use it will be proved as a milestone
in technology And the world will
find a new era of
.