Far-infrared (FIR) radiation refers to electromagnetic waves with wavelengths in the range of 15-1000 micrometers, which fall between the mid-infrared and terahertz regions of the electromagnetic spectrum. FIR radiation is commonly used in various scientific and industrial applications, such as thermal imaging, astronomy, medicine, and telecommunications. In the field of research, far-infrared radiation is studied for its applications in imaging and sensing, as well as its interactions with various materials. Researchers are interested in understanding how FIR radiation can be used for non-invasive imaging techniques, such as detecting tumors in medical imaging or analyzing the composition of materials in industrial applications. Additionally, FIR radiation is also being explored for its potential in promoting healing and reducing inflammation in medical treatments. Overall, research in the area of far-infrared radiation is focused on advancing our understanding of its properties and applications, with the goal of developing new technologies and techniques for a wide range of fields.