A one-way mirror works because its surfaces are half-silvered.

Question

Quizplus · Accepted Answer

A one-way mirror is made with a surface that is partially reflective and partially transparent, allowing light to pass through in one direction while reflecting it in the other direction. This is achieved by applying a thin, reflective coating of metal, such as silver, to one side of the glass or plastic surface. This coating is known as a half-silvered surface, and it is what enables the mirror to function as a one-way mirror.

A One-Way Mirror Works Because Its Surfaces Are Half-Silvered