the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range
"they could sense radiation in the infrared"
electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
"Thermal imaging cameras detect infrared radiation to see heat signatures that are invisible to the human eye."
electromagnetic radiation of a wavelength longer than visible light, but shorter than microwave radiation, having a wavelength between 700 nm and 1 mm
"The camera captures heat signatures by detecting infrared radiation that lies just beyond the range of visible light."
In plain English: Infrared is invisible light that you feel as heat but cannot see with your eyes.
"The remote control uses infrared light to communicate with the television."
Usage: Infrared refers to invisible heat waves emitted by warm objects that are detected as thermal energy rather than seen with the naked eye. This term is commonly used when describing technologies like night vision cameras or remote controls that operate using this specific range of electromagnetic radiation.
having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end
"infrared radiation"
"infrared photography"
Having the wavelength in the infrared.
"The security guard adjusted his goggles to detect the heat signatures of intruders, which appear as bright red spots on the infrared camera display."
In plain English: Infrared describes heat energy that you can feel but cannot see with your eyes.
"The remote control sends an invisible infrared signal to turn on the TV."
From infra- + red.