Question

Average energy density of an EM wave with electric field amplitude E₀ and magnetic field amplitude B₀ is equal to

(1) \(\frac 12\varepsilon_0E_0^2\)

(2) \(\frac{B_0^2}{\mu_0}\)

(3) \(\varepsilon_0E_0^2\)

(4) \(\frac 12\mu_0E_0^2\)

Answer 1

Correct option is (1) \(\frac 12\varepsilon_0E_0^2\)