(of electromagnetic radiation) having a wavelength just greater than that of the red end of the visible light spectrum but less than that of microwaves. Infrared radiation has a wavelength from about 800 nm to 1 mm, and is emitted particularly by heated objects (电磁辐射)红外线的 ■(of equipment or techniques) using or concerned with this radiation (设备,技术)使用红外线的,涉及红外线的 infrared cameras. 红外线照相机。
noun
[mass noun]the infrared region of the spectrum; infrared radiation 红外区;红外线;红外辐射