Q 12-08-113JEE MainJEE Main 2023 (10 Apr, Shift 1)Easy
The energy of an electromagnetic wave contained in a small volume oscillates with
Answer: (A) Double the frequency of the wave
Energy density $\propto E^2\propto\sin^2(\omega t)=\tfrac12(1-\cos2\omega t)$, which oscillates at twice the wave frequency.
Solution by Sreeraj P, M.Sc Physics