What is a one-way mirror ？
A one-way see-through film (also called a one-way film, a mirror film, etc.) refers to a film that is attached to a glass to make the glass have a high reflectance to visible light. The one-way fluoroscopic film can realize that when the outdoor is brighter than the indoor, the one-way see-through glass is similar to the ordinary mirror, and the indoor scene can not be seen in the outdoor, but the indoor can see the effect of the outdoor scene, and now the one-way perspective film is generally applied. At home life glass film.
The concept of one-way fluoroscopy is often misunderstood. It is believed that after the film is attached to the home, the room can be seen outdoors, and the room cannot be seen outdoors. In fact, one-way perspective is to achieve certain conditions: when the outdoor is brighter than the indoor, the one-way see-through glass is similar to the ordinary mirror, and the indoor scene can not be seen outdoors, but the indoor scenery can be seen indoors. When the outdoor is darker than the indoors, the indoor scenery can be seen outdoors, and the outdoor scenery can be seen indoors, and the degree of clarity depends on the intensity of the outdoor illumination.