Question: The electric field in the plane - parallel electromagnetic wave propagating in the z direction is described by the equation E ( z , t

The electric field in the plane-parallel electromagnetic wave propagating in the z direction is described by the equation E(z, t)= E0x cos ( z 30t+/3), where all numbers are in SI units. (1) What is the wavelength of this wave? (2) Given that the wave propagates with the speed of light, c =3108m/s, find the corresponding frequency of the wave. (3) Along which axis does the electric field E oscillate? Is there any component of the electric field along y axis?

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