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?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter16: Electromagnetic Waves

Section: Chapter Questions

Problem 99AP: The Poynting vector describes a flow of energy whenever electric and magnetic fields are present....

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