Li-Fi technology uses visible light communication (VLC) to transmit data wirelessly using LED light bulbs instead of radio waves. It provides higher security than Wi-Fi since light cannot pass through walls. Li-Fi has significantly higher data transmission rates, up to 10Gbps, and has advantages like avoiding radio interference and utilizing the unused visible light spectrum. However, it also has disadvantages like light not being able to pass through objects and potential interference from external light sources. If implemented well, Li-Fi could transform wireless internet access with every light bulb acting as a hotspot.

1. Li-Fi Technology
SADDAMHUSAIN HADIMANI
01FM15ECS030

2. Introduction
• Demand for wireless data communication
• Light-based Wi-Fi(Prof. Harald Haas)
• VLC – Visible Light Communication
• Uses light-emitting diodes (LEDs) for data transmission.

3. Why do we need an alternate technology?

5. How Li-Fi Works?

6. Real-time usage of Li-Fi

7. Wi-Fi vs Li-Fi
• 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 would use transceiver-fitted LED
lamps that can light a room as well as transmit and receive information.
• Wi Fi is great for general wireless coverage within building and Li Fi is
ideal for high density wireless date coverage in confined area and for
relieving radio interference issues.
• Li-Fi is more secure than Wi-Fi.

8. Applications
• Underwater communications
• Health sector
• Internet anywhere
• Safety and management

9. Advantages of Li-Fi
• 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.
• Since light cannot penetrate walls, it provides privacy and security that
Wi-Fi cannot.
• Li-Fi has low implementation and maintenance costs.

10. Disadvantages
• Light can't pass through objects.
• High installation cost of the VLC systems
• Interferences from external light sources like sun, light, normal bulbs,
opaque materials.

11. Conclusion
• If this technology can be put into practical use, every bulb can be used
something like a Wi-Fi hotspot to transmit wireless data and we will
proceed toward the cleaner, greener, safer and brighter future

12. ThankYou