Is there any evidence that tinfoil can deflect electro-magnetic radiation?
It clearly deflects the visible light portion of the electromagnetic spectrum, or you would be able so see through it! Different wavelengths of em radiation interact with different materials in different ways, so you would need to specify a part of the spectrum to investigate its interaction with tinfoil experimentally. http://en.wikipedia.org/wiki/Electromagnetic_spectrum (The following is in relation to radio frequency em waves and ‘tinfoil hats’ as protection.) “A well constructed tin foil enclosure would approximate a Faraday cage, reducing the amount of (typically harmless) radiofrequency electromagnetic radiation inside. A common high school physics demonstration involves placing an AM radio on tin foil, and then covering the radio with a metal bucket. This leads to a noticeable reduction in signal strength. The efficiency of such an enclosure in blocking such radiation depends on the thickness of the tin foil, as dictated by the skin depth, the distance the radiation can propaga
