In recent times, Li-Fi or Light Fidelity is coming up as a new technology for wireless-communication systems. What advantages are offered by Li-Fi over WiFi?
1. There is no need of License in using Light Fidelity
2. The Visible light spectrum is much larger then the Radio spectrum
3. Light does not interfere with various applications in aviation, medical science etc
4. Li-Fi does not require the line of sight for communication
Choose the correct option from the codes given below:
[A]Only 1 & 2 are correct
[B]Only 2 & 3 are correct
[C]Only 1, 2 & 3 are correct
[D]All are correct
Only 1, 2 & 3 are correct
Advantages & Challenges of Light Fidelity Advantages oSince this technology is based upon light, it’s a free band which does not need a license. Obviously it would be cheaper than Wi-Fi. Then, the visible light spectrum is 10 thousand times larger then the Radio spectrum and thus is NOT a scare resource. oSince Optical waves don’t pass through the walls, it could be used as a secured communication oThe speed of communication can be very high; theoretically it can be 1GB per second. oLight does not interfere with various applications in aviation, medical science etc. For example, in operating rooms, Wi-Fi is not allowed at many places. Similarly, Wi-Fi can interfere with the communication used in aviation. Challenges with Li-Fi oLi-Fi requires line of sight, when set up outdoors, the apparatus would need to deal with ever-changing conditions. oThe major challenge is that how the receiving device would transmit the data back to the sending device.