Thermal emission refers to the process of heat being emitted or radiated from an object as a form of electromagnetic radiation. This can occur at various temperatures and is influenced by factors such as the material and surface properties of the object. In research, thermal emission is often studied in the context of understanding how different materials behave when heated and how this radiation can be used for various applications such as remote sensing, thermal imaging, and energy harvesting. The study of thermal emission can provide insight into the thermal properties of materials and their interactions with their environment.