Electrochromism refers to the reversible change in color of a material when an electrical voltage is applied. This phenomenon is typically observed in certain organic and inorganic materials, which can alter their optical properties in response to an applied electric field. Electrochromic materials can switch between different colors or levels of transparency during oxidation or reduction processes. This change in color or transparency is due to modifications in the electronic structure of the material, which affects how it absorbs and reflects light.
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