Question

UPSC Prelims 2016 Question:

With reference to ‘LiFi’, recently in the news, which of the following statements is/are correct?

It uses light as the medium for high-speed data transmission.

It is a wireless technology and is several times faster than ‘WiFi’.

Select the correct answer using the code given below:

1. 1 only
2. 2 only
3. Both 1 and 2
4. Neither 1 nor 2

Answer (Detailed Solution Below)

Option 3: Both 1 and 2

Detailed Solution

Explanation :

LiFi is a Visible Light Communications system transmitting wireless internet communications at very high speeds using light as a medium. The technology makes a LED light bulb emit pulses of light that are undetectable to the human eye and within those emitted pulses, data can travel to and from receivers. So, statement 1 is correct.
LiFi transmission speeds can go over 100 Gbps, 14 times faster than WiGig, also known as the world’s fastest WiFi. So, statement 2 is correct.

Therefore, option (3) is the correct answer.

Subject: Science and Technology | Information and Communication Technology

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