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Good electricity conductors can stop the radio waves in their tracks.
You should be able to receive a radio signal in a tank, made of steel, which is good conductor. Surely, tanks use radios for communication but the radio antenna sticks out for that reason, while for safety of the radio transmission should be much wiser to keep the antenna inside under cover.
Moreover, water (again good conductor) prevents submarines from receiving traditional radio waves. The very long waves can go through though, the Navy uses 76Hz frequency for example. For many reasons long waves are impractical to use.
That gives you in meters: 3947368.421052632m, nearly 4000 km!
Wiki User
∙ 13y ago
Wiki User
∙ 9y agoMetals that have lower absorptivity to microwave energy include copper, silver and gold. Aluminum is used because it is cheap.
Wiki User
∙ 6y agoDepends on the type of radiation. (tin-foil, water, lead, a grounded screen)
Wiki User
∙ 13y agoChicken wire
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