The energy of a photon is the amount of electromagnetic radiation carried by a single particle of light. It is measured in units of joules (J) or electron volts (eV).
The energy of a photon can be calculated using the equation E = hf, where E is energy, h is Planck's constant (6.626 x 10^-34 J*s), and f is the frequency of the photon's electromagnetic wave.
An elementary particle is a subatomic particle that is not composed of other particles. Examples include electrons, protons, and neutrons.
When a photon interacts with an elementary particle, the energy of the photon is transferred to the particle, increasing its energy level. This can result in the particle's movement or the release of other particles.
The energy of a photon absorbed by an elementary particle is important because it can have significant effects on the behavior and properties of the particle. It can also provide valuable insights into the nature of matter and the fundamental forces that govern the universe.