FIR has various meanings in the Physics category. Discover the full forms, definitions, and usage contexts of FIR in Physics.
Far-infrared radiation (FIR) refers to the region in the infrared spectrum that is farthest from the visible light, typically ranging from 15 micrometers to 1 millimeter in wavelength. This type of radiation is emitted by all objects at temperatures above absolute zero, making it a critical area of study in thermal imaging and astronomy. FIR is absorbed by the Earth's atmosphere, which necessitates the use of space-based telescopes for its observation.
In the field of physics, FIR plays a pivotal role in understanding the thermal properties of materials and the universe. It is used in various applications, including remote sensing, where it helps in monitoring environmental changes and studying the cosmic microwave background radiation. The study of FIR has also led to advancements in medical therapies, such as FIR saunas, which are believed to offer health benefits by penetrating deep into tissues.
PhysicsLast updated: