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A radio station radiates waves into the hemisphere shown. Satellite r = 100 km Transmitter

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Question

A radio station on the earth’s surface emits a sinusoidal wave with average total power 50 kW. Assuming that the transmitter radiates equally in all directions above the ground (which is unlikely in real situations), find the electric-field and magnetic-field amplitudes E_max and B_max detected by a satellite 100 km from the antenna.

A radio station radiates waves into the hemisphere shown.
Satellite
r = 100 km
Transmitter

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