gardalex9584 gardalex9584

08-05-2024
Physics

Answered

Satellite TV is broadcast from satellites that orbit 37,000 km above the earth's surface. Their antennas broadcast a 15 kW microwave signal that covers most of North America, an area of about 2.5×10^7km².

a. What is the total power that strikes a 75-cm-diameter ground-based dish antenna?
b. The dish antenna focuses the incoming wave to a 1.0 cm² area.
c. What is the amplitude of the electric field at this focus?

Answer :

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