1) The electric field component of an electromagnetic plane wave propagating in vacuum is given In forms of It's three cartesian components ( Ex, Ey, Ez), in units at V/m, as Ex (x ,y,z, t) = ( 20 . 0 ( ) x sin [ky - (1.5x10 rad. ) t), and Ey=Ez=O5) The average power transmitted by the wave in problem ! ) per unit area perpendicular to the direction of propagation (intensity I ) is a ) 3. 54 x 10 - W /m 2 b) 0 . 53 w / m ( ) 1. 26 w / m2 d ) more information is needed