Is there a material that, under the influence of an electric current, turns into a mirror?

Question

Do it yourself

Is there a material that, under the influence of an electric current, turns into a mirror? (in its normal state it is transparent)
Something like a film or glass

Answer 1

Are liquid crystals suitable?
The principle of operation of displays is based on the fact that liquid crystal molecules, turning in an electric field, reflect and transmit light in different ways.
https://ru.wikipedia.org/wiki/%D0%96%D0%B8%D0%B4%D...
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Electro-optical systems based on liquid crystals and fullerenes - promising materials for nanoelectronics properties and areas https://books.ifmo.ru/file/pdf/301.pdf _

Answer 2

Would you like to capture a wheelbarrow and avoid responsibility? It can turn out to be quite expensive. Apparently, there are no reflective films yet, there are similar glasses. For example , here is something similar (a humanoid android talks about BenQ smart glasses). Wikipedia describes Smart glass in more detail . Well, in general, google "smart glass", "adjustable window tint" and the like.

Answer 3

I definitely saw films that, under the influence of electricity, from transparent become matte or black.

Answer 4

Various metals.
Under the action of stress in a vacuum, they evaporate and they settle on the glass, the transparent glass turns into a mirror.