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Q. A satellite in geostationary orbit is used to transmit data via electromagnetic radiation. The satellite is at the height of 35,000km above the surface of the earth, and we assume it has an isotropic power output of 1.00 kW (though, in practice, satellite antennas transmit signals that are less powerful but more directional).

Reception devices pick up the variation in the electric field vector of the electromagnetic wave sent out by the satellite. Given the satellite specifications listed in the problem introduction, what is the amplitude of the electric field vector of the satellite broadcast as measured at the surface of the earth? Use for the permittivity of space and for the speed of light.

State the amplitude of the electric field vector in micro volts per meter to three significant figures.

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