In the electromagnetic spectrum, gamma rays have the highest energy. They are a form of ionizing radiation with very short wavelengths and high frequencies, resulting in their significant energy levels. Gamma rays originate from the nuclei of radioactive atoms and are produced in various processes, including nuclear reactions and cosmic events. Due to their high energy, gamma rays can penetrate most materials and are utilized in medical applications, such as cancer treatment (radiotherapy) and diagnostics (PET scans). This characteristic makes gamma rays particularly important in both scientific research and medicine.