👉 Thermochromism is a phenomenon where materials are affected by changes in their internal temperature, such as when they are heated or cooled. This can be observed through the appearance of colors on objects that have been exposed to heat or cold, depending on the material's properties and the specific conditions under which it was exposed to those temperatures. For example, if a metal object is exposed to heat (e.g., a piece of iron may be heated up to 100°C), its surface
