For the plane electromagnetic wave given by E = E_0 sin (ω t- kx ) and B = B_0 sin (ω t- kx ), the ratio of average electric energy density to…

For the plane electromagnetic wave given by $\displaystyle \mathrm{E}=\mathrm{E}_0 \sin (\omega t-\mathrm{kx})$ and $\displaystyle \mathrm{B}=\mathrm{B}_0 \sin (\omega t-\mathrm{kx})$, the ratio of average electric energy density to average magnetic energy density is