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Jan 31, 2019 at 15:23 vote accept fschuindt
Jan 29, 2019 at 16:54 comment added The Photon @JohnDvorak, OP didn't specify visible light, and there's really very little practical difference between visible and IR. There's no reason a TV remote couldn't be done with visible light, except that it would be annoying to the user.
Jan 29, 2019 at 16:54 history edited The Photon CC BY-SA 4.0
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Jan 29, 2019 at 16:53 comment added John Dvorak "Free-space optical communication is commonly be done between a hand-held remote control and a television set." - that's infrared, though, not visible light.
Jan 29, 2019 at 16:51 history answered The Photon CC BY-SA 4.0