Q. With reference to ‘LiFi’, recently in the news, which of the following statement(s) is/are correct?

1. It uses light as the medium for high speed data transmission.
2. It is a wireless technology and several times faster than ‘WiFi’.

Select the correct answer using the code given below.

• 1 only
• 2 only
• Both 1 and 2
• Neither 1 nor 2

Answer: (c) Both 1 and 2

LiFi (Light Fidelity)

• LiFi (Light Fidelity) is a wireless communication technology that uses visible light, particularly LED bulbs, to transmit data.
  • It was first demonstrated in 2011 by Professor Harald Haas from the University of Edinburgh, Scotland, who also coined the term LiFi.
• It provides high-speed, bidirectional, networked mobile communication in a similar manner as WiFi but with higher speeds, lower latency, and a larger bandwidth (thousands of terahertz).
• LiFi has the advantage of being useful in electromagnetic-sensitive areas like aircraft cabins, hospitals, and nuclear power plants without causing electromagnetic interference. Its utilisation of unused visible lights in human life has opened up new opportunities in wireless communications technology.