Which kind of electromagnetic radiation contains the greatest energy per photon?

Gamma radiation

Explanation:

Gamma Radiation or Gamma Rays:

Type of electromagnetic radiation, and therefore formed by photons, generally produced by radioactive elements or subatomic processes such as the annihilation of a positron-electron pair. This type of radiation of such magnitude is also produced in astrophysical phenomena of great violence. Due to the high energies they possess, gamma rays constitute a type of ionizing radiation capable of penetrating matter more deeply than alpha or beta radiation. Given their high energy they can cause serious damage to the nucleus of the cells, so they are used to sterilize medical equipment and food. Gamma rays occur in the de-excitation of a nucleon from one level or excited state to another of lower energy and in the decay of radioactive isotopes. Gamma rays differ from x-rays in their origin, because the latter are produced at an extra-nuclear level, due to electronic braking phenomena. Generally associated with nuclear energy and nuclear reactors, radioactivity is found in our natural environment, from cosmic rays, which bombard us from the sun and galaxies outside our Solar System, to some radioactive isotopes that are part of our natural environment. In general, the gamma rays produced in space do not reach the surface of the Earth, as they are absorbed in the high atmosphere.

Gamma radiation can have the highest frequencies and, hence, the highest photon energies in the electromagnetic spectrum .

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