(Sarah of the Clue Crew points her remote, first at you, and then at her digital camera.)  You don't see anything happening when you press your remote, but hold it up to a camera & you can see it's communicating to the TV using this spectrum of light
[DOC] [TLE] July | 2015 | A Photo Editor [PAR] Jul 31, 2015 ... Rather than blowing you off completely, I thought I'd share a tiny bit ...