How EM Waves Transfer Energy

Electromagnetic waves transfer energy through their electric and magnetic fields. This energy can be easy to notice, like the warmth from the summer sun, or harder to feel, like the energy in gamma rays that can damage living cells.

The fields in an electromagnetic wave can exert forces on charge...

The energy density corresponding to electric and magnetic fields of an electromagnetic wave is proportional to the square of the respective field magnitudes.

Thus, the total energy density equals the sum of the energy density of both fields. Using the relation between the fields, the expression for energy density shows that the energy due...