Infrared Transmission

Infrared waves are those between the frequencies 300GHz and 400THz in the electromagnetic spectrum. Their wavelengths are shorter than microwaves but longer than visible light. Infrared propagation is line of sight.

They cannot penetrate walls and sun’s infrared rays interfere with these rays. So cannot be used for long – range communication. As their usage is confined within closed space, they do not need any government permissions for their applications.

Applications of Infrared Waves in Communications

• Remote controls for television, stereos and other home appliances.
• Wireless LANs
• Wireless modem, keyboard, mouse, printer etc
• Fire detectors
• Night vision systems
• Intrusion detection systems
• Motion detectors

Arjun Thakur

Updated on: 30-Jul-2019

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