Nuclear radiation can take several forms, including alpha particles, beta particles, gamma rays, and X-rays. Alpha particles are made up of two protons and two neutrons, and are positively charged. Beta particles are high-energy electrons or positrons, and can be positively or negatively charged. Gamma rays are electromagnetic radiation, similar to X-rays but with higher energy. X-rays are also electromagnetic radiation, but with lower energy than gamma rays.

Nuclear radiation can be naturally occurring, such as radiation from the sun and from radioactive materials found in the Earth's crust. It can also be artificially produced in nuclear power plants, nuclear weapons, and medical applications such as radiation therapy for cancer treatment. While nuclear radiation has many beneficial uses, it can also be hazardous to human health and the environment if not properly controlled and managed. Exposure to nuclear radiation can ionize atoms and molecules, potentially causing damage to living tissue, DNA, and other biological molecules, leading to health risks such as radiation sickness, cancer, and genetic mutations. Proper precautions and safety measures are important in dealing with nuclear radiation to minimize its potential harmful effects.