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most remotes use infrared light (IR)
more expensive remotes use radio frequency (RF)
IR is shortrange and requires line of sight... think of it like a flashlight...you could bounce it off a mirror at the TV and it would get there, but if something is in the way the light gets blocked.
RF is radio waves and can travel through walls and other objects...to operate devices in another room.
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∙ 13y ago
Wiki User
∙ 15y agoBy Using A Remote Control
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