A radio station is radiating EM waves with an average power of Pave = 500 kW from its vertical antenna whose length is L = 20 m. Assume that the radiation is cylindrically symmetric around this antenna. a) What is the average intensity of the laser light at a distance of 2.2 km from the source point? b) What is the radiation presure of the laser light at this distance on a totally reflective surface? c) What are the maximum values of the electric and magnetic fields at this distance?

A radio station is radiating EM waves with an average power of Pave = 500 kW from its vertical antenna whose length is L = 20 m. Assume that the radiation is cylindrically symmetric around this antenna. a) What is the average intensity of the laser light at a distance of 2.2 km from the source point? b) What is the radiation presure of the laser light at this distance on a totally reflective surface? c) What are the maximum values of the electric and magnetic fields at this distance?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

6. A radio station is radiating EM waves with an average power of Pave = 500 kW from its vertical antenna whose
length is L = 20 m. Assume that the radiation is cylindrically symmetric around this antenna.
a) What is the average intensity of the laser light at a distance of 2.2 km from the source point?
b) What is the radiation presure of the laser light at this distance on a totally reflective surface?
c) What are the maximum values of the electric and magnetic fields at this distance?
d) If the frequency of this EM wave is 10° Hz, figure out the electric and magnetic field vectors as a function
of time and space at this distance. (Write E along y, and B along z direction.)
e) Write the Poynting vector for this EM wave?

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