What is the formula for energy of an electromagnetic wave?

By the equation E = h ν E=h\nu E=hν , we have seen how the frequency of a light wave is proportional to its energy.

In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves .

Gamma rays have the highest energies and shortest wavelengths on the electromagnetic spectrum.