intensity of these waves

College Physics
1st Edition
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:Paul Peter Urone, Roger Hinrichs
Chapter24: Electromagnetic Waves
Section: Chapter Questions
Problem 38PE: Suppose a source of electromagnetic waves radiates uniformly in all directions in empty space where...
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QUESTION 12
A local radio station transmits radio waves uniformly in all directions with a total power of 3 x 105 W. What is the intensity of these waves when they reach a
receiving antenna located 20.0 km from the transmitting antenna?
1.49 x 10-5 W/m2
5.60 x 10-8 W/m2
1.17 x 10-7 w/m?
5.96 x 10-5 W/m2
3.73 × 10-6 Wim2
Transcribed Image Text:QUESTION 12 A local radio station transmits radio waves uniformly in all directions with a total power of 3 x 105 W. What is the intensity of these waves when they reach a receiving antenna located 20.0 km from the transmitting antenna? 1.49 x 10-5 W/m2 5.60 x 10-8 W/m2 1.17 x 10-7 w/m? 5.96 x 10-5 W/m2 3.73 × 10-6 Wim2
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