EM Wave Average Power

The equation of the electric field of an electromagnetic wave propagating through free space is given by :
$E = \sqrt {377}$ sin(6.27 × 10³t − 2.09 × 10⁻⁵x) N/C
The average power of the electromagnetic wave is $\left( {\frac{1}{\alpha }} \right)$ . The value of a is _______
$\left( {Take\,\,\sqrt {\frac{{{\mu _0}}}{{{\varepsilon _0}}}} = 377\,\,in\,\,SI\,\,units} \right)$

Ask about this question