Physics - EM Waves Question with Solution | TestHub

A $27\mathrm{mW}$ laser beam has a cross-sectional area of $10{\mathrm{mm}}^2$. The magnitude of the maximum electric field in this electromagnetic wave is given by: [Given permittivity of space ${ϵ}_0=9\times 10^{-12}\mathrm{SI}$ units, Speed of light $\mathrm{c}=3\times 10^8\mathrm{m}/\mathrm{s}]$