To identify a bi-directional Mirroring

Presents the mirror ArticleTwo way-user used frequently in the police stations and different types of rooms the interrogation to invisible observers anonymous view type. However, this particular glass is not hard to find and buy. If you spied a suspicion that you with a two-way mirror it is an easy way to be sure.Difficulty: EasyInstructionsThings you need: possible bidirectional mirrorFlashlight1Press your right against the glass and carefully nail. If you see a difference between your nail and his reflection, the mirror is not two-way. If your nail touches his reflection, it is possible that the mirror two - way. 2Knock on the mirror server is. If the sound is hollow, your case with a two-way mirror same stronger 3Turn is a flashlight in the mirror lights in the rooms and fixtures. If this is a bi-directional mirroring, you should be able that light seems to see above the surface of the mirror and the neighbouring region.