An unending succession of reflections can be seen in a room with mirrors on two opposite walls. The room will appear to be endlessly long.
Mirrors reflect light around themselves, so objects behind the mirror are invisible to people standing in front of it. However, if someone enters the reflection, they appear as if they were inside the mirror.
People have used this effect for entertainment purposes. In 1662, an Italian magician named Antonio Benivieni performed before Queen Christina of Sweden and caused astonishment by creating images of herself at several distances from the stage and then vanishing.
Modern variations on this theme include hiding objects in mirrors and seeing how many people can find them afterwards. This game was popular among children during the 1950s and 1960s.
Mirrors can also be used to deceive people. In 1770, French magician Jean Eugène Robert-Houdin created a new type of illusion called "The Disappearing Act". He covered a large mirror with paper that was slightly transparent. When the audience looked into the mirror, they saw their own faces but behind each of them there would be nothing but empty space.
Infinite pictures are generated when two mirrors are set parallel to and facing each other, and an item is put between them. The image of the item will be seen on both mirrors.
What would a room full of mirrors look like if nothing but the other mirrors reflected? Dark. Empty. Completely black except for the lights from the other mirrors reflecting off it. If you walk into an empty room and shut the door, you would expect it to get darker right? Well, in this case, when you close the door to this mirror room, what happens is that all the light from the other mirrors goes out. So instead of being dark, it's now completely illuminated by your flashlight.
Mirrors have two properties that make them useful tools for visualizing geometry: reflection and refraction. When light hits a surface with any kind of roughness, some of it is reflected and some of it is transmitted. A perfectly smooth surface will transmit all the light that hits it; there will be no reflection or transmission. But since we don't live in a world made of glass, most surfaces have both smooth and rough parts, so some light is reflected and some is transmitted.
The amount of reflection versus transmission depends on two things: how much texture there is on the surface and how far away it is from the source of light.
Having too many mirrors in one area makes people feel quite uneasy—as a general guideline, confine your mirrors to two walls in a room.
Mirrors reflect light rather than absorb it, making the space appear brighter and larger depending on where they are situated. A mirror adjacent to a window provides a view of what is outside while reflecting interior light.
Mirrors can also be used as decorative items by themselves without any additional lighting. They can be placed above a fireplace or inside a cabinet door for example.
Last but not least, mirrors can be used to deflect dangerous objects such as bullets away from people. In film and television, you will often see action heroes use their reflections in windows or doors to know how they are doing during fight scenes or other dangerous situations.
So next time you're hanging out with your friends in a dark room, remember that mirrors can help make it feel less gloomy by reflecting some light back into the space.
However, don't go overboard by hanging mirrors on every wall in the hope of quadrupling the size of your space; it doesn't work that way! This not only looks more elegant, but it also allows you to be much more creative with your decor.
Two-way mirrors operate on the basis of light intensity. This implies that, like a window, it reflects roughly half of the light that strikes its surface while allowing the other half to flow through. However, a two-way mirror can be used as a form of security camera by checking the identity of people behind it.
In science fiction, this device is known as "The Viewscreen". It can also be called a "viewfinder" or a "monitor".
In Star Trek, The Viewscreen was a transparent plate attached to the wall of a room. It could display any image from the memory banks of the ship's computer. The Viewscreen was used mainly for visual displays from the bridge of the Enterprise.
In the movie Avatar, this device is called a "vista screen".
In the video game Call of Duty: Black Ops III, this device is called a "headset display".
In the film Minority Report, this device is called a "precognizer".
In the television series Stargate SG-1, this device is called a "telportation system".
In the television series The X-Files, this device is called a "photographic imprint".