The Dictionary of the Climate Debate (DCD)


infrared radiation
Definition: (Aka. longwave radiation) Electromagnetic radiation that has a wavelength longer than that of visible light (400–700 nm), but which is shorter than that of terahertz radiation (100 µm – 1 mm) and microwaves.

Notes:
1. The direct-sunlight spectrum consists of 47% infrared radiation, 46% visible light, and 6% ultra-violet light.

2. Atmospheric greenhouse gases absorb and then re-radiate this radiation back to the surface, thereby creating the greenhouse effect.


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