With reference to ‘LiFi’, recently in the news, which of the following statements is/are correct? 1. It uses light as the medium for high speed data transmission. 2. It is wireless technology and is several times faster than ‘WiFi’. Select the correct answer using the codes given below:

Both statements are correct. LiFi, a term coined by Harald Haas, uses visible light emitted by LEDs as the carrier for data. The light is modulated faster than the eye can detect, so the bulb looks simply on. Statement 1 is therefore correct.

Statement 2 is also correct. LiFi is wireless because no physical cable carries the signal. Its theoretical and lab-demonstrated data rates are many times higher than typical WiFi, with some claims running to around 100 times. The visible light spectrum is vast and unlicensed, which adds capacity that the crowded radio spectrum cannot provide.

• A is wrong because it ignores statement 2, which is true.
• B is wrong because it ignores statement 1, which is true.
• D is wrong because both statements hold.

Core concept: Visible Light Communication (VLC) and radio spectrum scarcity. Mains angle: GS-III on science and technology and digital infrastructure, including bridging the digital divide and reducing radio interference in sensitive places such as hospitals and aircraft.

Trap: Treating the speed claim as a measured universal fact. Most LiFi speed figures come from lab or theoretical conditions, and the statement is about relative potential.