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
Ras El Tin Palace breaking over it. The adjacent pool house included a sitting room, bed chamber, fully equipped small kitchen, and rooms for staff and storing recreation and fishing gear. Ras El Tin is used as a naval base and for hosting state guests and events in recent years. There is no public museum or grounds access, unlike the Montaza Palace royal gardens and museum, also in Alexandria. Ras El Tin Palace Ras El Tin Palace ( , literally, "Cape Fig Palace") is a palace on the coast of the Mediterranean Sea in Alexandria, Egypt. It is one of the official residences for