Physics - EM Waves Question with Solution | TestHub

The electric field in a plane electromagnetic wave is given by
$\overrightarrow{\mathrm{E}}=200\cos \left[\left(0.5\times {10}^3 {\mathrm{m}}^{-1}\right)x-\left(1.5\times {10}^{11} \mathrm{rad} {\mathrm{s}}^{-1}\right)t\right] \mathrm{V} {\mathrm{m}}^{-1} \hat{\mathrm{j}}$.
If this wave falls normally on a perfectly reflecting surface having an area of$100{ \mathrm{cm}}^2$. If the radiation pressure exerted by the E.M. wave on the surface during a$10 \min$exposure is$\frac{k}{{10}^9} \mathrm{N} {\mathrm{m}}^{-2}$. Find the value of$k$