infrared light
nounUK /ˌɪnfrəˈred laɪt/
US /ˌɪnfrəˈred laɪt/
Infrared light is a kind of light that people cannot see, but we can feel it as heat.
The remote control sends infrared light to the TV to change the channel.
OTHER MEANINGS
2. Light with wavelengths longer than visible red light, used in devices like remote controls and heaters.
Night-vision cameras use infrared light to see in the dark.
3. The part of the electromagnetic spectrum just beyond the red end of visible light.
Scientists study infrared light to learn about the temperature of stars.
4. Radiation that warms objects without being seen.
An infrared lamp keeps the food warm in the restaurant.