UPSC General Studies Solved Paper - General Studies-2016

  • question_answer
    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 a wireless technology and is several times faster than 'WiFi'.
    Select the correct answer using the codes given below

    A)  Only 1             

    B)  Only 2

    C)  Both 1 and 2    

    D)         Neither1nor 2

    Correct Answer: C

    Solution :

    Exp. [c] LiFi technology is a ground-breaking light-based communication technology, which makes use of light waves instead of radio technology to deliver data. Using the visible light spectrum, LiFi technology can transmit data and unlock capacity which is 10,000 times greater than that available within the radio spectrum. The visible light spectrum is plentiful, free and unlicensed, mitigating the radio frequency spectrum crunch effect. The term was coined by Harald Haas and is a form of visible light communication and a subset of Optical Wireless Communications (OWC) and could be a complement to RF communication (WiFi or cellular networks), or even a replacement in contexts of data broadcasting.

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