Satellite TV is broadcast from satellites that orbit the earth. Their antennas broadcast a 15 kW microwave signal that covers most of North America, an area of about 2.5 × 107 km2. A 46-cm-diameter ground-based dish antenna focuses the incoming wave to a 1.0 cm2 area. What is the amplitude of the electric field at this focus?
Satellite TV is broadcast from satellites that orbit the earth. Their antennas broadcast a 15 kW microwave signal that covers most of North America, an area of about 2.5 × 107 km2. A 46-cm-diameter ground-based dish antenna focuses the incoming wave to a 1.0 cm2 area. What is the amplitude of the electric field at this focus?
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter24: Electromagnetic Waves
Section: Chapter Questions
Problem 7OQ
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Satellite TV is broadcast from satellites that orbit the earth. Their antennas broadcast a 15 kW microwave signal that covers most of North America, an area of about 2.5 × 107 km2. A 46-cm-diameter ground-based 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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