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3 answer(s)

Reply	martin_g says: Suposedly because the devices are less prone to interference. Visible light sources ( which may swamp the sensors ) being considerably more prevalent than IR ones. But, more likely, because it enhances feelings of  ' magic-ness ' of the system in the opinion of consumers who ( literally ) can't see how it works - thus increasing sales.  (2 votes) average rating:4 Tags: technology, light, RemoteControl, InfraRed, red, control, infra, visible.
	posted on 2009-11-02 20:12:01 | Report abuse

Reply	donkieshandbrake says: You can of course see if an infra red TV remote, or any infra red device for that matter, works by looking at it through the camera on your mobile phone - where it will curiously flash blue!  (no votes) Tags: technology, light, RemoteControl, InfraRed, red, control, infra, visible.
	posted on 2009-11-10 12:14:41 | Report abuse

Reply	Georg says: Hello dholme, the reason is straightforward: Diodes emitting IR do have a much better efficency than such emitting red or even green light. Second is, that silicon photodiodes  have their maximal sensitivity around the same wavelengths. So, You get much more "commands" from a battery at more "yards" using  IR. Georg  (no votes) Tags: technology, light, RemoteControl, InfraRed, red, control, infra, visible.
	posted on 2010-10-14 19:03:15 | Report abuse