γ (Gamma) radiation is a type of high-energy electromagnetic radiation emitted by radioactive materials. It has no mass and no electric charge, allowing it to penetrate various materials, including human tissue. This makes γ radiation both useful in medical applications, such as cancer treatment, and hazardous due to its potential to cause cellular damage. Gamma rays are produced during nuclear reactions, such as those occurring in nuclear power plants or during the decay of radioactive isotopes. They are part of the electromagnetic spectrum, which also includes X-rays, ultraviolet light, and visible light, but γ radiation has a much higher energy level.