Li-Fi is a wireless optical networking technology that uses LED light bulbs for data transmission. It can transmit data through visible light communication at speeds up to 10Gbps. Li-Fi uses light instead of radio waves to transmit information and has advantages over Wi-Fi such as higher speeds, low costs, and large bandwidth. However, it requires line of sight between the light source and receiver and cannot penetrate walls. Potential applications of Li-Fi include use in homes, offices, hospitals and aviation.

1. LIFI-LIGHT FIDELITY
Presentation By:
NIRANJAN.EU
MANJUNATH.H
SES POLYTECHNIC, SIRUGUPPA.

2. CONTENTS
• Introduction
• History
• How LI-FI works?
• Visible spectrum
• Li-Fi over Wi-Fi
• Adavantages
• Disadvantages
• Applications
• Myths about lifi
• Conclusion

3. Introduction
• LiFi is a wireless optical networking technology
that uses light-emitting diodes (LEDs) for data
transmission.
• LiFi is designed to use LED light bulbs similar to
those currently in use homes and offices.
• LiFi data is transmitted by the LED bulbs and
received by photoreceptors.

5. How li-fi works.

8. VISIBLE SPECTRUM

9. LIFI OVER WIFI
• Li-Fi can be thought of as a light-based Wi-Fi.
That is, it uses light instead of radio waves to
transmit information.
• Instead of Wi-Fi modems, Li-Fi use
transceiver-fitted LED lamps that can light a
room as well as transmit and receive
information.

12. ADVANTAGES
• Li-Fi can solve problems related to the
insufficiency of radio frequency bandwidth
because this technology uses Visible light
spectrum that has still not been greatly utilized.
• High data transmission rates of up to 10Gbps
can be achieved.
• Li-Fi has low costs.

13. DISADVANTAGES
Nothing in this world is perfect and so does
LIFI.
• These signals cannot penetrate walls. So the
person needs wired bulb in that room also.
• Only works if there is direct line of sight
between source and receiver.

15. APPLICATIONS

19. Myths about LI-FI
• LIFI is not 100x faster than wi-fi,
• the latest wifi standard(IEEE 802.11ad) or wi-
Gig supports data rates of 7Gbps.
• LI-FI has never achieved 700Gbps.