lmqr5381 lmqr5381

24-05-2023
Physics

contestada

A spherically spreading EM wave comes from a 1400-WW source. Assume that the wave travels in free space.
What is the intensity at a distance of 4.2 mm ?
answer in W/m^2
What is the rms value of the electric field at a distance of 4.2 mm ?

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