color change

Color change occurs when a substance’s molecules or structure react with something else, causing them to absorb or reflect different wavelengths of light. This can happen through physical changes, like food ripening, or chemical reactions, such as rust forming or a pH indicator changing color in response to acidity or alkalinity. Essentially, the material’s optical properties are altered, resulting in a visible shift in color. This process provides visual clues about the material’s condition or composition and is widely used in things like food ripening, chemical testing, and material durability assessments.