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2. One-way mirror - Wikipedia

   en.wikipedia.org/wiki/One-way_mirror

   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. Reflection (physics) - Wikipedia

   en.wikipedia.org/wiki/Reflection_(physics)

   Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of light, sound and water waves. The law of reflection says that for specular reflection (for example at a mirror) the angle at which the ...

6. Omnidirectional (360-degree) camera - Wikipedia

   en.wikipedia.org/wiki/Omnidirectional_(360...

   Schematic of an omnidirectional camera with two mirrors: 1. Camera 2. Upper Mirror 3. Lower Mirror 4. "Black Spot" 5. Field of View (light blue) In photography, an omnidirectional camera (from "omni", meaning all), also known as 360-degree camera, is a camera having a field of view that covers approximately the entire sphere or at least a full circle in the horizontal plane.

7. Twin-lens reflex camera - Wikipedia

   en.wikipedia.org/wiki/Twin-lens_reflex_camera

   Twin-lens reflex camera. The front of a Kinaflex twin-lens reflex camera. The focus rings of the two lenses are coupled with gears around their circumference in this simple design. A twin-lens reflex camera (TLR) is a type of camera with two objective lenses of the same focal length. One of the lenses is the photographic objective or "taking ...