Infrared radiation is a type of electromagnetic radiation with longer wavelengths than visible light. It is commonly used in a variety of scientific fields, including astronomy, medicine, and environmental science. Infrared radiation is emitted by all objects with a temperature above absolute zero and can be used to detect and study objects and materials that are not visible to the naked eye. Infrared technology is also used in devices such as infrared cameras and sensors for various applications, such as night vision, heat detection, and remote sensing.