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Robots become teacher.... from playing field robots comes to class room and help us to learn hand writing ,to learn English., In Japan calligraphy guru ....it helps us to learn  calligraphy., In South Korea English learn special robots it helps us to learn English., Student learn jil Watson jorgia institute of technology jil Watson name robot is a teacher it help students at their institute.

How to make wifi faster ?use light a team start up has come up with lifi which uses light as a medium to transmit data to and from a device lifi is a Wi-Fi network that uses light as the media to transfer data the technology is currently under the development phase with Airbus  lifi require a modified receiver and light source.