The electric field of an electromagnetic...

The electric field of an electromagnetic wave in free spaces is given by `barE=5 cos(10^5t+kx)j`, where t in second and x in meter then

The wave number k is `1/3*10^-3 m^-1`

The wavelength lambda is `6π*10^3 m`

The wave amplitude is `5 V/m`

All of these

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