Gamma Ray - GCSE Physics Definition

Gamma rays are a form of electromagnetic radiation with the highest energy. They have the shortest wavelength and highest frequency in the electromagnetic spectrum. Gamma rays are produced by the radioactive decay of atomic nuclei and various high-energy processes in the universe, like supernova explosions. In GCSE Physics, students learn that gamma rays have no mass or charge, but they are highly penetrating. This makes them useful in medical treatments like cancer radiotherapy and in sterilising medical equipment. Gamma rays also require careful shielding, by materials such as lead, to protect against their potentially harmful effects on living tissue.