Li-Fi (Light-Fidelity) uses light as a medium to carry data
Q. Recently a new technology has been developed for communication called as Li-Fi. Li-Fi is- Published on 21 Feb 16a. Light Fit
b. Lithium Fiber
c. Light Fiber
d. Light Fidelity
ANSWER: Light Fidelity
- Prof. Harald Haas of the University of Edinburgh coined the term Li-Fi in 2011.
- Light waves instead of radio frequency waves will be used to carry data. The data from internet flows into a device which is connected to a LED bulb. Then the light containing data from this bulb falls on a receiver or a dongle connected to the computer.
- RF (radio frequency) spectrum would not be enough considering the rate of growth of wireless data communication. The visible light spectrum was much larger.
- The use of the light spectrum for Li-Fi overcomes the issues in traditional wireless communication, like the shortage of spectrum and network disruption because of interference.
- In Li-Fi, anyone who has access to light can access the Internet. The system also allows users to move from one light source to another without losing their network connection.
- For connecting to the Internet in the night the stream of photons can be reduced to a minimal level that won’t produce visible light but enough to carry data.
- Though Li-Fi was poised to compete with Wi-Fi, it was not meant to replace it.
- The Li-Flame is described as the world’s first true Li-Fi system. Latest product is LiFi-X. First product is Li-1st, second Li-Flame.
