<unk>  is the radiation of energy by means of fast-moving subatomic<unk> s.<unk>  is referred to as a<unk>  beam if the<unk> s are all moving in the same direction, similar to a light beam.
Due to the wave-particle duality, all moving<unk> s also have wave character. Higher energy<unk> s more easily exhibit<unk>  characteristics, while lower energy<unk> s more easily exhibit wave characteristics.
Particle radiation
Ionizing radiation
Irradiation
Ultraviolet germicidal irradiation
Synchrotron radiation
Gamma ray
Regenerative medicine
Biological engineering