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Suppose that the electric field part of an electromagnetic wave invacuum is E = {(3.1 N/C) cos [(1.8 rad/m) y + (5.4 x 106 rad/stli(a) What is the direction of propagation?(b) What is the wavelength λ ?(c) What is the frequency v?(d) What is the amplitude of the magnetic field part of the wave?uitte an ernression for the magnetic field part of the wave.

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