Communication Devices

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IR needs line of sight. RF is bluetooth. Don't mistake medium of transmission for protocal.
 
Bluetooth operates using RF , Rf can have very low range (passive RFID) to very long range (space crafts) , band width depends on freq , LOS and N-LOS operation possible . IR used in Tv remote and OFC , or LOS communication ,very high bandwidth
 
Hmm somehow im not getting the same vibe of this thread. Still looks like google or wikipedia must be down.
 
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