Satellite TV is broadcast from satellites that orbit 37,000 kmkm above the earth's surface. Their antennas broadcast a 15 kWkW microwave signal that covers most of North America, an area of about 2.5×107km22.5×107km2. What is the total power that strikes a 90-cmcm-diameter ground-based dish antenna? The dish antenna focuses the incoming wave to a 1.0 cm2cm2 area. What is the amplitude of the electric field at this focus?

Satellite TV is broadcast from satellites that orbit 37,000 kmkm above the earth's surface. Their antennas broadcast a 15 kWkW microwave signal that covers most of North America, an area of about 2.5×107km22.5×107km2. What is the total power that strikes a 90-cmcm-diameter ground-based dish antenna? The dish antenna focuses the incoming wave to a 1.0 cm2cm2 area. What is the amplitude of the electric field at this focus?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter16: Electromagnetic Waves

Section: Chapter Questions

Problem 98AP: A radio station broadcasts its radio waves with a power of 50,000 W. What would be the intensity of...

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