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 x 107 km2.a. What is the total power that strikes a 46-cm-diameter ground-based dish antenna?b. The dish antenna focuses the incoming wave to a 1.0 cm2 area. What is the amplitude of the electric field at this focus?

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Answered: Satellite TV is broadcast from…

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter16: Electromagnetic Waves

Section: Chapter Questions

Problem 94AP: A certain microwave oven projects 1.00 kW of microwaves onto a 30-cm-by-40-cm area. (a) What is its...

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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 x 10⁷ km².
a. What is the total power that strikes a 46-cm-diameter ground-based dish antenna?
b. The dish antenna focuses the incoming wave to a 1.0 cm²area. What is the amplitude of the electric field at this focus?

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