A plane electromagnetic wave propagating in x -direction is described by ${E_y} = \left( {200{\rm{V}}{{\rm{m}}^{ - 1}}} \right)\sin \left[ {1.5 \times {{10}^7}{\rm{t}} - 0.05{\rm{x}}} \right];$
The intensity of the wave is :
$\left( {{\rm{ Use }}{_0} = 8.85 \times {{10}^{ - 12}}{{\rm{C}}^2}\;{{\rm{N}}^{ - 1}}\;{{\rm{m}}^{ - 2}}} \right)$