Electrochromism

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Notion

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Science and technology

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What Wikipedia says

Electrochromism is a phenomenon in which a material displays changes in color or opacity in response to an electrical stimulus. In this way, a smart window made of an electrochromic material can block specific wavelengths of ultraviolet, visible or (near) infrared light.

Excerpt from the Wikipedia article “Electrochromism”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Smokefoot, Public domain, via Wikimedia Commons.