Li-Fi (Light Fidelity) is a wireless communication technology that transmits data using visible light from LED bulbs instead of radio waves.
It promises very high speeds and is immune to radio interference, making it attractive for secure and high-density environments.
An LED light source is switched on and off at extremely high speeds — imperceptible to the human eye — to encode binary data. A photodetector at the receiver converts the light variations back into an electrical signal and then into data.
Because light cannot pass through walls, Li-Fi offers better security and avoids the radio-frequency congestion that affects Wi-Fi.
| Aspect | Details |
|---|---|
| Branch | Electronics & Communication Engineering (ECE) |
| Topic Type | Technical Seminar / Project Report |
| Difficulty | Intermediate – Advanced |
| Best For | Final-year BTech seminars & presentations |
| Includes | Explanation, key points, FAQs & references |