Why do remote controls use infrared light instead of other wavelengths?
In: Technology
It is cheap to make and have the advantage that is it line of sight so without adding any complex pair system is it limited to the room and will not control stuff in different room or apartments or even houses that would be the case it you just transmitted for example radio wave.
It had the drawback that it is line of sight so stuff like game consoles uses radio waves. But then you need to pair the device and the remote. That add user complexity and radio is a bit more expensive to use.
You use IR and not visible light so you can’t see the blinking like you can with many digital cameras.
Latest Answers