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.
Infrared radiation refers to the portion of the electromagnetic spectrum that lies between visible light and radio waves. It is commonly referred to as "heat radiation" because it is typically experienced as heat rather than as visible light. Infrared radiation has wavelengths longer than those of visible light, ranging from about 700 nanometers (nm) to 1 millimeter (mm). This type of radiation is emitted by all objects that have a temperature greater than absolute zero (0 Kelvin or -273.15 degrees Celsius), including the sun, humans, and even inanimate objects like buildings and rocks. Infrared radiation is often used in applications such as thermal imaging, remote controls, and heating systems.
