You have probably heard of one-way mirror glass, one-way window glass, or one-way privacy glass, especially in terms of police stations or interrogation rooms, or one-way window for homes. But do you know how it works? What makes it one way? Let me tell ya! What makes it "one-way" is the fact that it's reflective on one side and transparent on the other side, whereas standard glass is transparent on both sides. A common question Solar Art gets is can you see through one-way glass? Depending on what side of the glass you are on, you will either be able to see through the one-way glass window, or it will seem like you're looking into a mirror.
For one-way window glass to work, it requires that the light on one side of the glass is twice as bright as the other side. This is why one-way windows so commonly used in police stations. It gives the policemen the ability to see into a room, without being seen. They can listen to the conversation and see what's going on, without anyone knowing they are watching.
