What does infrared communication primarily involve?

Infrared communication primarily involves visual communication by light outside of the visual spectrum. Infrared waves are not visible to the human eye but can transmit information over short distances, making them useful for various applications like remote controls, wireless data transfer, and some forms of sensor technologies. This method relies on the transmission of modulated light waves in the infrared spectrum, effectively enabling devices to communicate without physical connections.

While other forms of communication such as sound waves, physical gestures, and electronic devices are important in their contexts, they do not encapsulate the functionality of infrared communication. Sound waves refer to audio signals, physical gestures rely on body language and are not a form of light-based communication, and while electronic devices communicate in various ways, not all of their communication involves infrared technology specifically.