In a plane electromagnetic wave $U_E$ and $U_B$ are average energy densities of electric field and magnetic…
In a plane electromagnetic wave $U_E$ and $U_B$ are average energy densities of electric field and magnetic field respectively, then the correct option in the following is
$U_E=\frac{U_B}{2}$
$U_E=2 U_B$
$U_E=U_B$
$U_E \neq U_B$
Solution
Energy of electromagnetic wave is equally shared between electric and magnetic fields, $U_E=U_B$.
i.e, $\frac{1}{2} \varepsilon_0 E^2=\frac{1}{2 \mu_0} B^2$