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what is infrared radiation?
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Infrared radiation is a type of electromagnetic radiation with longer wavelengths than visible light. It is often referred to as "heat radiation" because it is felt as warmth on the skin when emitted by objects at normal temperatures. Infrared radiation is produced by the thermal motion of molecules and atoms, and is used in a variety of applications such as heating, cooking, remote sensing, and medical imaging. It lies between visible light on the shorter wavelength side and longer microwaves on the other end.