A two-way mirror, also called a one-way mirror, is a pane of glass that acts like a regular mirror on one side while allowing someone to see through from the other side. It’s commonly used in ...
Mental Floss on MSN

How Do Two-Way Mirrors Work?

It’s a familiar scene from every police procedural: In one brightly lit room, a perp is being questioned. In an adjacent room ...
One classic set you’ll see in most vintage mystery movies is an interrogation room with a “two-way” mirror in one wall. This cool gadget lets the witnesses see the suspects from another room while the ...