Project seafarer was an ambitious program to construct an enormous antenna, buried underground on a site about 1 km2 in area. its purpose was to transmit signals to submarines while they were deeply submerged. if the effective wavelength were 1.8 × 104 earth radii, what would be the (a) frequency and (b) period of the radiation emitted? ordinarily, electromagnetic radiations do not penetrate very far into conductors such as seawater. take the earth's radius to be 6370 km. (a) number enter your answer for part (a) in accordance to the question statemententry field with incorrect answer units choose the answer for part (a) from the menu in accordance to the question statemententry field with correct answer