The intensity of TV broad cast station of E = 800 Sin (10⁹ t - k x) V/m is ......... and the wave length in meter is ..............

$\begin{array}{rcl}\mathrm{E}& =& 800 \sin \left({10}^9\mathrm{t}-\mathrm{kx}\right) {\mathrm{Vm}}^{-1}\\ \mathrm{I}& =& {\mathrm{u}}_{\mathrm{avg}} \mathrm{x} \mathrm{C}\\ & =& \frac{1}{2}{\mathrm{\epsilon }}_0{{\mathrm{E}}_0}^2 \mathrm{x} \mathrm{C}\\ & =& \frac{1}{2} \mathrm{x} 8.85 \mathrm{x} {10}^{-12} \mathrm{x} {\left(800\right)}^2 \mathrm{x} 3 \mathrm{x} {10}^8\\ & =& 849.6\\ & \approx & 850 {\mathrm{Wm}}^{-2}\\ \mathrm{\omega }& =& {10}^9, 2\mathrm{\pi n}={10}^9 , \mathrm{n}=\frac{{10}^9}{2\mathrm{\pi }} ; \mathrm{C}=\mathrm{n\lambda }\\ \mathrm{\lambda }& =& \frac{\mathrm{C}}{\mathrm{n}}=\frac{3 \mathrm{x} {10}^8}{{10}^9} \mathrm{x} 2\mathrm{\pi } ;\\ \mathrm{\lambda }& =& 0.6\mathrm{\pi } \mathrm{m}\end{array}$