A television remote uses

[amp_mcq option1=”infrared waves” option2=”cosmic waves” option3=”microwaves” option4=”ether waves” correct=”option1″]

This question was previously asked in

UPSC CAPF – 2012

Most traditional television remote controls use infrared (IR) light to send signals to the television. These signals are invisible to the human eye.

– Infrared waves are a type of electromagnetic radiation with wavelengths longer than visible light.
– IR communication is suitable for short-range, line-of-sight applications like remote controls.

Newer types of remote controls, particularly for smart TVs or other devices, may use radio waves (like Bluetooth or Wi-Fi) which do not require a direct line of sight. However, the vast majority of standard TV remotes use infrared.

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