Infrared

Infrared in relation to electromagnetic spectrum

Plot of atmospheric transmittance in part of the infrared region.

Infrared (IR) is invisible radiant energy, electromagnetic radiation with longer wavelengths than those of visible light, extending from the nominal red edge of the visible spectrum at 700 nanometers (frequency 430 THz) to 1 mm (300 GHz) (although people can see infrared up to at least 1050 nm in experiments). Most of the thermal radiation emitted by objects near room temperature is infrared.

单词	Thermal infrared
释义	Thermal infrared 原声例句 TED演讲（视频版） 2017年3月合集 One of the reasons NEOWISE is so valuable is that it sees the sky in the thermal infrared. NEOWISE 如此有价值的原因之一是它可以在热红外线中看到天空。英语百科 Infrared Infrared (IR) is invisible radiant energy, electromagnetic radiation with longer wavelengths than those of visible light, extending from the nominal red edge of the visible spectrum at 700 nanometers (frequency 430 THz) to 1 mm (300 GHz) (although people can see infrared up to at least 1050 nm in experiments). Most of the thermal radiation emitted by objects near room temperature is infrared.
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Thermal infrared

Infrared