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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
- UGC NET
- Library and Information Science
Which of the following technologies use electronic waves at radio frequency for data transmission?
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Eduncle Best Answer
1. Li-Fi : Li-Fi (short for light fidelity) is wireless communication technology, which utilizes light to transmit data and position between devices. The term was first introduced by Harald Haas during a 2011 TED Global talk in Edinburgh.
2. WI.Fi : Wi-Fi networks have no physical wired connection between sender and receiver by using radio frequency (RF) technology -- a frequency within the electromagnetic spectrum associated with radio wave propagation. When an RF current is supplied to an antenna, an electromagnetic field is created that then is able to propagate through space.
3. Optical Cables : A fiber-optic cable, also known as an optical-fiber cable, is an assembly similar to an electrical cable, but containing one or more optical fibers that are used to carry light. The optical fiber elements are typically individually coated with plastic layers and contained in a protective tube suitable for the environment where the cable will be deployed.
4. Twisted Pairs : Twisted pair cabling is a type of wiring in which two conductors of a single circuit are twisted together for the purposes of improving electromagnetic compatibility.