Spy Guy Set with Look Around Binoculars

okay so let's say you're a spy or even an overly protective dad and you want to know when somebody leaves their room but you don't want to get caught setting up some camera in the hallway or something that can be seen but you want to be able to see the action right through the walls is that possible well I'm gonna show you that it is possible with the technology that's available to everybody this is pretty amazing actually so I'm going to be showing you how you can get motion detection that sees through solid walls and even solid concrete okay so to understand how this is working first you have to understand that different wavelengths of electromagnetic waves can penetrate different objects for example we all know that visible light penetrates glass but as you can see here using my infrared camera you can see that infrared light doesn't penetrate glass so using a device called a wall AB