👉 In the context of physics, an "epithermal" is a type of material that exhibits electrical conductivity when exposed to electric fields. This phenomenon is often observed in materials like semiconductor devices (like diodes, transistors, and avalanche photodetectors) or superconductors where it becomes conductive at low temperatures. In the context of electromagnetism, an "epithermal" occurs when a magnetic field interacts with a material that has a large electric conductivity. This interaction can