What is the energy of one photon and how does it relate to the behavior of light?

The energy of one photon is directly proportional to its frequency. This relationship is described by Planck's equation: E hf, where E is the energy of the photon, h is Planck's constant, and f is the frequency of the photon. The behavior of light, including its interactions with matter and its wave-particle duality, is influenced by the energy of its constituent photons.