Gamma rays are a form of electromagnetic radiation, similar to visible light but with much higher energy. They are produced by radioactive atoms and certain types of cosmic events, such as supernovae. Gamma rays have the shortest wavelength in the electromagnetic spectrum, making them highly penetrating and capable of passing through most materials. Due to their high energy, gamma rays are used in various applications, including medical treatments like radiation therapy for cancer. They are also employed in nuclear medicine for imaging and diagnosis. However, exposure to gamma rays can be harmful, necessitating protective measures in environments where they are present.