Wireless Medium : Radio Wave | Microwave | Infrared
Infrared Basics - IR Heating Equipment and Infrared Ovens by PROTHERM, LLC
Electromagnetic (EM) Spectrum | Center for Science Education
What are the difference between radio waves, micro waves & infrared waves? What's the role of transmitter, receiver, transceiver, router, repeater, aerial, and the satellite in a communication system? - Quora