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2. One-way mirror - Wikipedia

   en.wikipedia.org/wiki/One-way_mirror

   A one-way mirror, also called two-way mirror[1] (or one-way glass, half-silvered mirror, and semi-transparent mirror), is a reciprocal mirror that appears reflective from one side and transparent from the other. The perception of one-way transmission is achieved when one side of the mirror is brightly lit and the other side is dark.

3. Mirror - Wikipedia

   en.wikipedia.org/wiki/Mirror

   One-way mirrors One-way mirrors (also called two-way mirrors) work by overwhelming dim transmitted light with bright reflected light. [60] A true one-way mirror that actually allows light to be transmitted in one direction only without requiring external energy is not possible as it violates the second law of thermodynamics. [citation needed]:

4. Infinity mirror - Wikipedia

   en.wikipedia.org/wiki/Infinity_mirror

   The infinity mirror (also sometimes called an infinite mirror) is a configuration of two or more parallel or angled mirrors, which are arranged to create a series of smaller and smaller reflections that appear to recede to infinity. [1][2] Often the front mirror of an infinity mirror is half-silvered (a so-called one way mirror), but this is ...

5. Ambigram - Wikipedia

   en.wikipedia.org/wiki/Ambigram

   This two-way writing system reveals that modern ambigrams can have quite ancient origins, with an intuitive component in some minds. Mirror writing in Islamic calligraphy flourished during the early modern period, but its origins may stretch as far back as pre-Islamic mirror-image rock inscriptions in the Hejaz. [30]

6. Magical objects in Harry Potter - Wikipedia

   en.wikipedia.org/wiki/Magical_objects_in_Harry...

   That mirror is a part of a set of Two-way Mirrors that are activated by holding one of them and saying the name of the other possessor, causing his or her face to appear on the caller's mirror and vice versa. Harry receives this mirror from Sirius in a package after spending his Christmas holiday at Grimmauld Place.

7. Dielectric mirror - Wikipedia

   en.wikipedia.org/wiki/Dielectric_mirror

   Dielectric mirror. A dielectric mirror, also known as a Bragg mirror, is a type of mirror composed of multiple thin layers of dielectric material, typically deposited on a substrate of glass or some other optical material. By careful choice of the type and thickness of the dielectric layers, one can design an optical coating with specified ...

8. First-surface mirror - Wikipedia

   en.wikipedia.org/wiki/First-surface_mirror

   A first-surface mirror or front-surface mirror (also commonly abbreviated FS mirror or FSM) is a mirror with the reflective surface being above a backing, as opposed to the conventional, second-surface mirror with the reflective surface behind a transparent substrate such as glass or acrylic. [1] Historically, the bronze mirror, an FSM type ...

9. Window film - Wikipedia

   en.wikipedia.org/wiki/Window_film

   Correctly applied mirror film can create one-way mirrors. Note that in order to be effective, the light differential must be 6–0 times greater to maintain the intended performance. For example, during the day, buildings with tinted windows are difficult to see into, but at night, the windows become much easier to see through.