Li-fi (light fidelity) li-fi is a light based communication, data transfer through light, their are some advantages and disadvantages also, highly secure

1. LI-FI
TECHNOLOGY
Presented by
Md Rasid

2. CONTENTS
INTRODUCTION
HISTORY
HOW Li-Fi WORK
APPLICAITON
Advantage
DIS ADVANTAGE
CONCLUSION

3. • Li-Fi can be thought of as a light
based wi-Fi. It’s uses light instead of
radio waves to transmit information.
INTRODUCTION

4. • 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.
• The term was first introduced by Harald Hass during a
2011 TEDGLOBAL talk
HISTORY

5. • The LED’s can be switched on and off very quickly which gives
nice opportunity for data transfer in the form of Binary code.
• Switching ON an LED is logical ‘1’ , Switching of an LED is
logical ‘0’.
• Hence it is possible to encode the data.
How Li-Fi
Work

6. TRAFFIC LIGHTS
• Traffic light can communicate to the car Through Li-fi.
• Cars have LED based headlights, LED based back lights, and
cars can communicate with each other and prevent accident’s
by exchanging information.
UNDERWATER COMMUNICATION
• Wi-Fi cannot be used in underwater communication because in water the Radio Waves
are get absorbed. Li-Fi can be used underwater because light can penetrate deep
water.
APLICATION

7. • Higher speeds than Wi-Fi
• Highly secure
• Low cost
• Easy to use
Advantage

8. • Internet cannot be used without a light source.
• Light can’t pass through objects.
• High installation cost of the VLC systems
DIS ADVANTAGE

9. • the technology could enable greater area of coverage than a
single Wi-Fi router.
CONCLUSION

10. Thank
You