Li-Fi development.

[Rorschach]

Move aside Wi-Fi, there's a new super-fast wireless internet coming called Li-Fi

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[Super Nova]

Called Li-Fi, it's a wireless internet technology that rapidly transmits data using flickering LED light fields between 400 and 800 terahertz. It's a process known as Visible Light Communication, which is like an advanced form of morse-code which, much like switching a torch on and off in a pattern that relays a message, the LED light flicks on and off at such extreme speeds that it can be used to write and transmit things in binary code

Cool but I wonder if visible light needs direct line of sight between PC and the router to work.