#7: WiFi or LiFi? What Kind of ‘Fi­delity’?

Malta Independent - - NEWS -

in 1991. It op­er­ates by us­ing a high-fre­quency ra­dio sig­nal. It is the router that sends the sig­nals that carry the data to and from the In­ter­net. The WiFi is limited only by the power of trans­mis­sion, the an­tenna type, the lo­ca­tion and the en­vi­ron­ment in gen­eral, ex­am­ple thick walls or very high build­ings.

LiFi or ‘Light Fi­delity’ was coined by Pro­fes­sor Herald Hass of Ed­in­burgh in 2011 TED Talk. It is 100 times faster than its pre­de­ces­sor! How­ever, it is good to note how it works. LiFi is based on a ‘vis­i­ble light com­mu­ni­ca­tion’, mean­ing that it needs light to work, and more pre­cisely, LEDs. Data is trans­ferred through the LED light beam and then, through a photo-de­tec­tor (known as a pho­to­di­ode), it is con­verted again by the re­ceiver into elec-

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