The ratio of average electric energy density to total average energy density of an electromagnetic wave is:
Options

Question

The ratio of average electric energy density to total average energy density of an electromagnetic wave is:

G1 Physics · Accepted Answer

For an electromagnetic wave: ⟨uₑ⟩ = ⟨uʙ⟩ Total average energy density: ⟨uₜₒₜ⟩ = ⟨uₑ⟩ + ⟨uʙ⟩ = 2⟨uₑ⟩ Therefore: ⟨uₑ⟩/⟨uₜₒₜ⟩ = 1/2 Hence option D.