Tin foil hat radio with a metal bucket. The AM radio is completely inside a metal enclosure. This leads to a noticeable reduction in signal strength received by the AM radio. The efficiency of a metal enclosure in blocking electromagnetic radiation depends on the thickness of the foil, as dictated by the "skin depth" of the conductor for a particular wave frequency range of the radiation. For half-millimetre-thick aluminum foil, radiation above about 20 kHz (i.e., including both AM and FM bands) would be partially blocked, although aluminum foil is not sold in this thickness, so numerous layers of foil would be required
Tin Goyenda Tin Goyenda Tin Goyenda ( ) is a series of juvenile detective novels written by Rakib Hasan and published in Bangladesh by Sheba Prokashoni. The Tin Goyenda series is a subseries of "Kishore Thriller" (juvenile thriller) series of Sheba Prokashoni. Apart from Tin Goyenda, "Kishore Thriller Adventure" is another subseries. The books were made into a TV series. Tin Goyenda is the tale of three teenage detectives. They are investigators and adventurers. The three young friends, Kishore Pasha, Musa Aman and Robin Milford formed the Tin Goyenda. Sometimes Georgina Parker (more commonly referred to as "Jina") and her pet dog