LI-FI: Light Fidelity-The Transmission of Data through Light

Li-Fi or Light Fidelity or 5G visible Light communication is a Latest technology using Light Emitting Diodes to transmit data similar to Wi-Fi. In this days the people who are all in need for the Wi-Fi hotspot has increased tremendously Li-Fi or New Life of data communication is a better alternative to Wi-Fi in wireless communication. This paper proposes a survey on Li-Fi Technology. The Li-fi technology was invented by Professor Harald Hass of University of Edinburgh. Li-Fi has more capacity in terms of bandwidth in visible region therefore it does not poke its nose in other communications which uses radio frequency range, without taking its frequency bands. Li-Fi has thousand times greater speed than Wi-Fi and provides security as the visible light is unable to penetrate through the walls, which propose a new era of wireless communication. The concept of is data communication on fast flickering of light which is not detected by human eye but it is focused on photo detector which converts the on-off state into binary digital data. It has gained a huge popularity in two years of its invention. Such technology has brought not only greener but safer and cheaper future of communication. This paper introduces this concept.