The ability to see through walls is no longer the stuff of science fiction, thanks to new radar technology.
Can Radiation Pass Through Walls. However, it does weaken the signal a little bit. Concrete will also let the wifi signal pass right through and with it the rf radiation.
Myth debunked: Thermal imaging cameras can easily ‘see ... from cdn-attachments.timesofmalta.com
But just as light can't pass through solid objects in quantities large enough for the eye to detect, it's hard to build radar that can penetrate walls well enough to show what's happening behind. Heat transfer through radiation takes place in form of electromagnetic waves mainly in the infrared region. Radiation heat transfer can be described by reference to the 'black body'.
They're small enough to do that.
Today, the situation has changed due to technological advancements that the higher the frequency, the less the radiation penetrates through walls. There should be a general concept as to why the radio waves are able to pass through walls but microwaves or light waves cannot ! Infrared radiation does not even pass through a sheet. Ionizing radiation through this region will create holes in the valence band and electrons in.
