Between the rooms is a two-way mirror, which allows the officers to watch the suspect’s questioning without being seen. But how is that even possible? Traditional mirrors are created using a ...

The idea of a smart mirror seems like some crazy thing from the future, but over on Adafruit, they show off a really easy way to build your own with an old Android device and a two-way mirror.

[Matt] built a black shroud out of foam board and put in two-way mirror. How does that help? Well, with the set up, you can put a very thin black web camera pointing up towards the mirror.

When you watch cop shows on TV you often see suspects being interviewed in a room with a two-way mirror. In this Moment of Science, we'll learn how they work. Two-way mirrors work on a principle ...