Properties of EM Waves: Practice Problem & Solution

Short Solution (Best for NEET):

To solve this problem, we apply the core principles of Properties of EM Waves. Understanding the underlying formula is key to arriving at the correct answer below:

In an electromagnetic wave, the energy is equally divided between the electric and magnetic fields.
The average energy density of the electric field equals that of the magnetic field ($u_E = u_B$).
Therefore, their ratio of contributions to the intensity is $1 : 1$.