A spherically spreading EM wave comes from a 1700W source.Part AAt a distance of 4.7 m , what is the intensity?Express your answer using two significant figures.ΑΣφI =W/m? What is the rms value of the electric field?Express your answer using two significant figures.ΑΣφ?Erms =V/m

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A spherically spreading EM wave comes from a 1700 W source. Part A At a distance of 4.7 m, what is the intensity? Express your answer using two significant figures. ? I = W/m?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter16: Electromagnetic Waves

Section: Chapter Questions

Problem 49P: A plane electromagnetic wave travels northward. At one instant, its electric field has a magnitude...

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Question

A spherically spreading EM wave comes from a 1700
W source.
Part A
At a distance of 4.7 m , what is the intensity?
Express your answer using two significant figures.
ΑΣφ
I =
W/m?

What is the rms value of the electric field?
Express your answer using two significant figures.
ΑΣφ
?
Erms =
V/m

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