4. (1 Points) Assume there is no charge or current distribution in a volume of free space, but there exists an electroma

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4 1 Points Assume There Is No Charge Or Current Distribution In A Volume Of Free Space But There Exists An Electroma 1 (20.2 KiB) Viewed 69 times

4. (1 Points) Assume there is no charge or current distribution in a volume of free space, but there exists an electromagnetic field. The expression for its electric field component is given by EF.t) = Egetik-out) where fo is a constant vector, k is the wavevector and E, 1k, w is the angular frequency. (a) Use Maxwell's equations to find out the corresponding magnetic field (7.1). (b) Calculate the energy density of the electric field (we) and the energy density of the magnetic field (w). Compare their values and what do you observe? (c) Write down the expression of the associated Poynting vector $(7.6).